One of the most popular of Barnum's animals was a huge elephant named Jumbo.

VOA: special.2009.01.11

Then the seesaw will balance, even if you put a potato on one side and an elephant on the other side.

那即使你一边放个土豆,一边放头大象,那跷跷板也会平衡

耶鲁公开课 - 基础物理课程节选

Do not think of a pink elephant for the next three seconds ? and I am sure no one thought of a pink elephant right?

在接下来的十秒钟里不要想粉色大象,我肯定没有人想一头粉色大象，是吗？

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If you knew this was one kilogram, then the acceleration of the elephant, which will be some tiny number, maybe 100th of what this guy did; the mass of the elephant is then 100 kilograms.

如果已知这个物体的质量为 1 千克,那大象的加速度,会是一个比较小的数,可能是物体加速度的 1 / 100,大象的质量就是 100 千克

耶鲁公开课 - 基础物理课程节选