to和with区别，becontented

be converted to 转变为

例句

A compound that could potentially be converted to a new drug by optimizing its beneficial effects and minimizing its toxicity and side effects.

通过优化药用减少毒性和副作用可以使其转变为一种新药的化合物。

be contented with满足于例句

It is right to be contented with what we have， never with what we are.

可以满足于所得，但不要满足于自己。

后接词性不同， be contented to 后接动作，满足于做某事， be contented with 后接名词，动名词表示对什么感到满意。