投身

He took up the cause with evangelical fervor.

他以传道者般的热情投身于这一事业。

All the causes seem equally deserving.

看来所有的这些事业都得投身。

Involving himself in the Liberation War at the age of 16 in literary and art work, later as editor and playwrite.

16岁投身解放战争，作文艺工作，后作编辑、编剧。

You say that cruelty to animals is wrong, so why not have the courage of your convictions and join our campaign?

既说残忍地对待动物是不对的，那什么没有勇气做正确的事，投身到我们的运动中来呢？