来自《耶鲁大学开放课程：基础物理第14集第14集》

as it picks up speed.

施加越来越大的力
In other words, you'll be pushing it like crazy.

打个比方你就像个疯子一样推着它
It won't pick up speed,

但这并不会增加它的速度
but its momentum will be going up.

而是增加了动量
It'll pick up speed,

其实会使质点加速
but this pickup in speed will be imperceptible

但速度的增量是微乎其微的
because in the 19th decimal place of v/c,

因为那仅改变 v/c 的小数点后
it'll go from 99999 to something near the end

第 19 位的值即小数末位从 99999
that the last digit will change.

变成更趋近于极限的数字
But the momentum will change a lot.

但动量的改变会很大
But I don't want to stop

不过我不会只说到这里
before looking at this guy.

我还要讲讲这个东西