来自《耶鲁大学开放课程：基础物理第9集第9集》

there is an acceleration we associate with that,

会有一个相应的加速度
and it's as real as any other acceleration;

这跟其它加速度一样是真实存在的
it needs a force to make it happen.

有力才能产生
Maybe the better way to ask you is this.

更好的说法是
Suppose this little speck here is you, okay?

假设这个点是你
You happen to be stuck on a rotating chainsaw blade,

你被卡在了电锯的刃口上
and you're clinging to it for dear life.

你为了保住宝贵的生命而抓住它
What force do you have to apply

你需要用多大的力
to stay onto that rotating blade?

才能留住旋转的刃口上
This may not happen to you and me

这也许不会在我们身上发生
but if you're in organized crime,

但如果你参与了有组织的犯罪活动
this is not a very unusual situation.

这种情况还是有可能的