It has not all been sweetness and light between him and the mayor.

他和市长之间的关系并不总是很融洽。

I used to be all sweetness and light on the outside, but inside I would be boiling with rage.

我过去虽然表面上笑呵呵的，可是心里却怒火中烧。

We must work for sweetness and light.

我们必须为甜蜜和光明而工作。

It was not however all sweetness and light.

然而，并不是一切都是甜蜜和光荣。

The relationship is not all sweetness and light.

但两国间的关系并不都是亲切美好的。