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1·Try to go as low as you can and then bounce up.

尝试尽可能的低，然后再反弹上去。

2·Even though, the boy liked to bounce up and down.

尽管如此，男孩还是喜欢上下弹跳。

3·If rock was held down, formerly, it can bounce up.

之前，如果岩石掉落，可以弹跳起来；

4·The head should not bounce up and down during this drill.

在做这个训练的时候，头部不允许上下移动。

5·Patient: Why do you ask me to bounce up and down on my bed?

病人：为什么你让我在床上上下蹦跳呢？

6·Medicine Patient: Why do you ask me to bounce up and down on my bed?

病人：为什么你让我在床上上下蹦跳呢？

7·As it starts to bounce up it will stretch in the direction it is going.

当小球弹跳起来后它要在它弹跳的方向上拉伸变形。

8·Now I'm going to drop them together vertically down, and then this ball will bounce up somehow.

现在我将要把它们同时垂直投下，然后球会以某种方式弹起。

9·So if I release it all the way here, you would not expect that it will bounce up all the way to here.

如果我在这里释放，不可能,它会到达这点。

10·He then placed the second lift on the ledge and used it to bounce up even higher, landing on the top rim of the canyon.

然后他用第二个发射器把自己弹到更高的地方，站到了峡谷的顶端。