There's not much bounce left in these balls.

这些球已没有多少弹性了。

《牛津词典》

These balls are big, and those balls are small.

这些球大，那些球小。

youdao

Most people do this with pendulums where they bounce these balls against each other.

大部分人用单摆做，它们会碰撞，相互碰撞。

youdao

But I'm sure you can easily see how these styrofoam balls could, in fact, be a mono layer of gold nuclei.

这个实验怎么工作的,我们先来做些计算，但我相信你们都已经。

麻省理工公开课 - 化学原理课程节选

So, 13 backscattered. TAs, if you can maybe pick up these ping-pong balls for me.

把这些球捡起来，我觉得如果，我摔倒一定很搞笑。

麻省理工公开课 - 化学原理课程节选

We have 266 ping-pong balls, and we need someone, hopefully you, to be some radioactive material that are going to be emitting these ping-pong balls. And when the time comes, in just a minute, I'll ask the TAs to come down and hand these out very quickly to you, so we can do this experiment.

你们有些人那天，看到我在办公室数乒乓球，我们需要几个人,希望是你,来作为放射材料，放射这些乒乓球,等会我会让助教,把这些球发给你们。

麻省理工公开课 - 化学原理课程节选

We are delighted that these balls were not produced using child labour or any other kind of exploitation and are proud to use them.

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You are hitting these balls in front of an array of six high speed cameras connected to computers that map your every move, in addition to all aspects of ball flight.

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The embryo defenders say each of these microscopic balls is a human life that shouldn't be wasted.

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