透明视频动画是目前比较流行的实现动画的一种, 大厂也相继开源自己的框架，最终我们选中 腾讯vap ，它支持了Android、IOS、Web，为我们封装flutter_vap提供了天然的便利，并且它提供了将帧图片生成带alpha通道视频的工具，这简直太赞了。
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VAP（Video Animation Player）是企鹅电竞开发，用于播放酷炫动画的实现方案。
video for youtube
video for qiniu
apk download
github
一个 dart 文件就是一个库文件
每个 dart 文件默认导入了系统核心库 dart:core 其他库需手动导入：
import 'dart:系统库库名';
import 文件后可直接使用，默认导入一个库的所有变量和方法。
文件名后+ as +自定义名称,导入的库起的别名，同python
文件名后+ show +导入的变量或方法：只导入 show 后面的变量或方法
文件名后+ hide +隐藏的变量或方法：出 hide 后面的变量或方法，其他的变量和方法全部导入
export 公共的库文件的抽取
可以在pub.dev网站中查找第三方库。
然后即可引用使用
Although the Yuan Jia scenic area subordinates in the region in the Chinese first country forest park - - Zhangjiajie country forest park, but from the geographical position, is actually been situated by many things around a center the Zhangjiajie Wuling source scenic spot area the core, most beautiful canyon Jin Bianxi is close with the world, east meets Suoxiyu, south looks into the distance the kite sub-stronghold, gazes westwards the Huang Shih stronghold, north depends on Tianzishan, the total area the approximately 1200 hectares, average elevation 1074 meters
The first under heaven bridge takes Zhangjiajie one of ten big certainly scenery, stretches across between two mountains, grand magnificent. Bows the head under the bridge, but sees the white clouds to fly acorss, the high peak stands in great numbers; Takes a broad view looks out in all directions, the overlapping, the dense and numerous independent pinnacle jump into the view, lets you be eyes cannot take it all. The first under heaven bridge bridge floor width 2 meters, the depth 5 meters, the span is 25 meters, the vertical elevation difference 357 meters, are the vertical elevation difference biggest natural spontaneity stone plank bridges which in the world discovered until now. The locality has a Tuchia nationality ballad to describe first under heaven bridge's with overpowering momentum like this: A bridge height is also high, by the fog package, first day on the bridge is thrown daily the flower petal, 15 also in airborne flutter. In fact, the first under heaven bridge steps two mountains are originally link in together, lithical is only frailer because of the middle part, because makes decent, the avalanche function influence, also the process is exposed to the sun and rain, the stream erosion, the mountain torrent to wreak havoc, the year age year old, year old of old year after year, then forms has presented at present this unrivalled marvelous sight.
The fontanel mountain, is Zhangjiajie is written down most early the annals the famous mountains, the elevation 1518.6 meters, stands majestically in the Zhangjiajie urban district border, is apart from the urban district only 8 kilometers, as if Zhangjiajie's natural painted screen, becomes one of Zhangjiajie most representative natural landscape. , The fontanel mountain not only by its mysterious unique geological appearance, the elegant incomparable natural scenery is for long amazing, because its profound great cultural connotation, the colourful humanities win the mark to be known far and wide, is revered for the Zhangjiajie's soul, the spiritual soul of culture, has the western Hunan first god mountain fine reputation。
（The park entrance) the friends are good! Zhangjiajie forest park. This is the park front door. Everybody looked that one side this front door has the local Tujia national minority folk custom style small grey tile botanical garden type construction, at the same time matches by the sandstone pinnacle, the front door and the nature unifies ingeniously in together. on May 28, 1992, the United Nations Educational, Scientific and Cultural Organization sent to inspect approves the Wuling source declaration world natural heritage matters concerned two officials, after the car passed through the park front door to drive hundred rice, shouted again and again: “gate! Gate!”Also lets the driver come back but actually the vehicle, at the same time is full of praise appreciates the natural affective tone which the front door returns returns to original condition plain, at the same time presses camera's shutter repeatedly. Therefore, welcome everybody in this “gate of the nature” front, absorbs own glorious image. (Huang Shih stronghold road tablet) “on the Huang Shih stronghold, does not arrive at Zhangjiajie in vain”, obviously Huang Shih stronghold in Zhangjiajie scenery status. Hands down the Han Dynasty to keep Hou Zhangliang to be disillusioned with the mortal world, to resign from office does not do, follows the red pine nut, the concealment rivers and lakes, tours Zhangjiajie, is sieged by the officers and soldiers, the latter master worker Huang Shih male rescuing acquires fame the Huang Shih stronghold, is the Zhangjiajie beautiful scene most centralized place, is also Zhangjiajie biggest flies high looks at the scenery Taiwan. A renowned poet appraises the Huang Shih stronghold like this: “five steps express admiration, seven steps exclaim over, outside ten steps, dumbfounded.”Therefore, suggested that ascends the Huang Shih stronghold on foot, then rides the rope way to descend the mountain, or rides the rope way to climb mountains first, then descends the mountain from the outlying hill, otherwise, you might be truly “arrive at Zhangjiajie in vain”. The Huang Shih stronghold entire journey the approximately 5 hours, the walk climbs mountains the approximately 5 kilometers. what (cedar Lin Youjing) we walks now is cedar Lin Youjing. Ascended the Huang Shih stronghold since old times only then a Mt. Hou road, today we walk this road, is more than ten years ago opens cutting artificially.
旅游是美好的，你知道如何写一篇关于旅游的英语作文吗?下面是我给大家精心挑选的高中英语作文旅游计划A，希望大家喜欢!供你参考和阅读!
英语作文旅游计划篇1
In an inadvertently, I opened the space tunnel. A strong force will be involved in me, I fly fly ah. Looking at the front of no margin, I want to finish, go back. Suddenly, I stopped, though I stopped in a future world, but I found that Arabic numerals and Chinese characters were still in use. so good! I will inevitably have some luck.
I continued to walk, feeling at the foot like stepping on cotton candy. When I came to a school, I saw everything changed. A building has become a piece of big cream cake. Students do not have to go upstairs, there is a button on the bag, a press, flew into their own classroom. Do not eat breakfast at home, come to school wherever there, pull a piece of want to eat, at the foot of the step does not matter, because the foot is 100% clean shoes. I came to a classroom, get out of class time, the teacher click on the red button, the classroom all the tables like trapped into the quagmire as a trap. Amazing! Wait until the class, the teacher press the green button table all out.
At the door of a fast food restaurant, I found a table next to only two pieces of glass, and nothing else. Curiosity made me have to go in and see. I walked into the door and sat in a chair. The glass next to the table is strange and has two buttons. I pressed a bit, the glass appeared on the front dishes five products: 'Longfeng Chengxiang', 'Hong word chicken cucumber', 'Fu word melon burnt ridge,' 'million words spicy belly silk', ' 'I pressed the green button, all these things on the table. I finished eating that this is Manchu full of food. I'll go ahead and finish. Went to a children's shopping mall.
There are a lot of toys, there are riding can fly the bike, as well as robot mother, I think this is because Mom and Dad did not have time to take care of the child looking for 'nanny' it!
I went to buy clothes in the mall, when the door with a ray of red line from your body passing, will feel what you want clothes, suitable for what clothes to wear, within 5 minutes can make 50 out of the clothes, any of your selection.
I went to a travel agency, but now the human is not just going abroad so simple, they go to Mars, Mercury, Saturn, etc., really wonderful ah!
The future of the world is really wonderful, I wake up in the morning, only to find this is a dream, hope in the near future, this dream will become a reality
英语作文旅游计划篇2
Since the evil witch of the West was defeated by Dorothy, she changed herself and tried to do something that could be done for everyone to make up for her past mistakes. But people are still very afraid of her evil power, so they will hide her everywhere. By chance, the Western witches found that people liked to have a historic or beautiful place to play. So, she took out the magic bubble machine, said loudly: "Hello everyone, I am a Western witch! According to my recent observation, I found that we all like to travel, so I want to make up for my previous mistakes, when a Back to the tour, with free to visit the Qin Shi Huang Mausoleum, Peach Blossom Island and the universe in a beautiful and unusual planet - wings of the stars to travel. Please interested in this trip, on the 'light into battle', to my home to set! Just a huge bubble on the Western witch loaded with the voice, floating into the air, for people to pass the news. People know the news, joys and sorrows. People want to travel, but do not believe that Western witches really reformed. So, they are reluctantly parting, suppress their own desires, pretend not heard, turn a blind eye to her.
Western witches that people do not want to believe her, flutter in bed, crying, thinking: Why do I want to make up, God does not give me the opportunity? Is it really that I usually do evil too much? I had known why today ah ... ... but not all people are so cold, refused the Western witch of a mind. Dorothy, Pippi, Sherlock Holmes, Jay Chou is this very someone else.
"Ding dong, ding dong ... ..." With the bells ringing, the Western witch wiped the tears of his eyes, came a "carp playing very", jumped from the bed, quickly put on slippers, and the floor crunched The sound, opened the dusty long time the door. "Western witch, we come to you this report! Take us to travel it!" Several very different sounds in the ear for a long time to reverberate. Western witch's face showing a long absence smile. "The West Witch took out the magic blanket, and then said," Everyone hastened to sit up, we set out! "Western witch see everyone all sit tight, they read the spell. Suddenly, dark clouds, a huge vortex appeared in the top of the house. As the Western witch's spells grew faster, and with the screams of Dorothy and Pippi, everyone was involved in the whirlpool
英语作文旅游计划篇3
Summer, sunny and sunny. My father and dad, and my father's friends and their families to play with Cangshan.
We drive from Huangyan on the high-speed, after more than an hour's driving, to the sea. On the way through a lively road, that there is just today "market".
We sat in the car and came to the uphill road. Where the mountain can be really "plate" it! The car's "tail" suddenly thrown from the side of the side, like the "s" shaped the same. Because the mountains around to go around, engage in a few children to motion sickness, we often rest. The car opened for ten minutes and rested for a while. To the mountainside, seeing the distance above only a little bit, but the traffic is a long time. Suddenly on the road, I saw a lot of cow dung. "See! Cow dung!" I screamed. The car drove open, unknowingly, we came to the top of the hill. I estimated the time, from the foot of the mountain to the peak actually opened for almost two hours!
We first finished the lunch in the hotel at the top of the mountain, looked out the billboard, which reads: Cangshan is located in Taizhou Linhai territory, the main peak rice sieve waves, elevation 1382,4 meters, the first peak in the southeast of Zhejiang. We also visited the "Millennium Dawn Monument" which is the first ray of sunshine in the new century, the first place to shine. Everyone took pictures in front of the monument.
We seem to come to the top of the cloud, Wow! Good air fresh! From the top of the hill from the top down to see, so high ah! Like the cliffs of the same peak. I think: from the top of the mountain fell, people will certainly be crushed. Then we saw a lot of windmills, all in rotation, but there were a few winds up and did not spin.
We drove the car and came to a place called runway. On the way, we thought there would be a big prairie, and there might be a few horses on the run. After that, I am stupid. There is only one open space, not even a pony. The ground is covered with weeds, short, and dense. There are a lot of cow dung on the ground! Originally, here often cattle to graze. Here is standing a very tall windmill, the truth stood a giant, a huge cylinder is the body of the windmill, we three or four people can not hold it! Here is far and near, full of windmill shadow. Look, there is a cow in the distance in the gnawing of the grass, but not see the shadow of herdsmen, presumably cattle owners do not have to worry about cattle will escape or lose streak. We also accidentally found that the grass inside also grow a few mushrooms, look very nice, very fresh, it should be toxic it
Finally, we came to a place, here depending on the home of a family, there are a few family dog, eyeing our arrival, very scary. Under the car, we went to an abandoned scenic area, unmanaged look. There are several villas that have been built here, the rooms are ready, the bathroom and so on are readily available, in addition to no bed outside. Villa house design and construction of a very good, but it is abandoned no one living, the door is open, no one cooking, it is a pity! The air at the top of the mountain is very fresh, the foggy, the temperature is also very comfortable, summer is a good place for summer. Along the way, we see a lot of cattle, are free to eat grass or wandering. There are a pile of dung dung
One day the journey so far, we went down the car. Home on the way, asleep, really comfortable! Has long been through the winding road, wake up after the already on the highway, also to avoid the Panshan, motion sickness.
Linhai Cangshan really beautiful ah! I love you. The next time I will come back to the summer, or maybe it is to enjoy the beautiful winter snow it!
