I will count down three to zero, and then you can see that they reach the bottom almost at the same time.

我从3倒数到，你们能看到它们几乎，同时抵达底部。

youdao

I will count down three to zero, and then you can see that they reach the bottom almost at the same time.

我从3倒数到，你们能看到它们几乎，同时抵达底部。

youdao