I'm going to find a1 over aE is equal to mE over m,

就会发现 a1 比 aE 等于 mE 比 m
which is the one kilogram mass.

m 等于 1 千克
What we needed was some mechanism of exerting some fixed force.

我们需要的是一些能够产生恒力的装置
We didn't have to know its magnitude.

我们无需知道这个力的大小
But the acceleration it produces on the elephant and on the mass,

但这个力使大象和物体产生的加速度
are in an inverse ratio of their masses.

与它们的质量成反比
If you knew this was one kilogram,

如果已知这个物体的质量为 1 千克
then the acceleration of the elephant,

那大象的加速度
which will be some tiny number,

会是一个比较小的数
maybe 100th of what this guy did;

可能是物体加速度的 1 / 100
the mass of the elephant is then 100 kilograms.

大象的质量就是 100 千克
Note there are, again, subtleties even here.

我们再次发现这其中的精妙之处