dt If you divide both sides by dt, which mathematicians cannot do, but physicists can, then you get /dt=ds/dt d theta/dt equals ds/dt, and v/l that is the velocity divided by l.

如果两边同除以，数学家不会这么做，但是物理学家可以,得到dθ,等于。

youdao

However, the Guardian has crunched the numbers and says the divide in the US is more like the 0.01% v the 99.99%.

BBC: The rich: Exactly what does the terminology mean?