David: We'll let it loop once more.
大卫:我们再放一次音乐。
Looking from a distance like a gigantic arch, it is a continuous loop, a kind of square doughnut.
从远处看像一座巨大的拱门,它是一个连续的环,像一种方形面包圈。
Because of this loop, which is promoted by warmer temperatures in winter and spring, well, it looks like the tundra may be turning into shrub land.
由于冬春两季气温的上升加剧了这样的循环,因此,苔原可能正在向灌木林地转变。
> David: We'll let it loop once more.
>,大卫:我们再放一次音乐。
All right, you can see that this little piece of code, it's got a loop in there, and what's it doing?
好,你们看到的这一小块代码,是做了一个循环吧?,他在做什么?
Well, we say at the top of the loop, when it goes up and comes down the velocity is 0.
在曲线顶端,当物体上升,然后速度为0时候
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