to keep smike is healthy for you keeping smile is healthy for you
问题描述：
to keep smike is healthy for you keeping smile is healthy for you
答
翻译：
保持微笑对你的健康有益.两句话有什么不同一个用不定式做主语，另一个用动名词做主语，语义十分接近，只是形式上的不同，好比：thanks和thank you。客气