I release it with zero speed.

以初速度为0释放。

youdao

And I will show you now what is the average speed between time zero and four.

现在我要给你们看的是，0到4秒间的，平均速率。

youdao

And I will show you now what is the average speed between time zero and four.

现在我要给你们看的是，0到4秒间的，平均速率。

youdao