一些哲学家认为爱情类似于战场。

Some philosophers argue that love is ___analogous to a battlefield.

增加香烟税类似于劝阻吸烟。

Increasing taxes on cigarettes is ___analogous to discouraging smoking.

原子的结构类似于一个微型太阳系。

The structure of an atom is ___analogous to a miniature solar system.