And I have purposely made the arrow shorter to indicate that it has been slowed because we are going to argue its mass didn't change, so the only way to change its energy is to change its velocity.

我已经故意将这个箭头弄短,用来象征它变慢了,因为我们将证明它的质量没有变，只有它的能量改变了,也就是它的速度变了。

麻省理工公开课 - 固态化学导论课程节选

- And because I'm writing out a string that's the same length -- -- my strings aren't getting shorter -- it's creating this illusion of some animation.

因为我写了一个长度相同的字符串-,我的字符串不会变的更短-,它生成一个动画幻觉。

哈佛公开课 - 计算机科学课程节选

So, you will feel weightless for a short time or you'll feel your weight is little.

所以你会短时间的感觉到无重力,或者感到自己变轻了

耶鲁公开课 - 基础物理课程节选