People like to analogize in order to help understand complex ideas, but unfortunately too often those comparisons aren't analogous.

人们喜欢用类比来帮助理解复杂的概念，但很可惜太多时候那些对比都是没有可比性的。

Police officers fear invidious comparisons.

警官们担心不公平的比较。

Its recommendations are based on detailed comparisons between the public and private sectors.

其建议是以公有和私有部门之间的详细比较为根据的。

I didn't expect unfavourable comparisons between my sons and their friends.

我没料到我的儿子们和他们的朋友们相比有相形见绌之处。

So this is doing comparisons.

那么这个操作是在做比较。

But these comparisons are risky.

然而做这些比较是有风险的。