1、when it comes to当提到；

When it comes to diet and exercise, we know what to do, but we don't do what we know.
当提到饮食和运动的时候，我们都知道怎么去做，但是我们不会按照我们知道的去做*P8bBzBV8|Fdue7c%9j-。

2、in relation to关于；
This fixed the dollar in relation to metal but not in relation to things, like shoes or yarn, that dollars could buy.
这个比例基本涉及到金属业，但不涉及到比如鞋子或纱线这些美元可以买到商品6~cF~]X2^174.,]=N。