Efficiency in grain production isn't an option—it's a necessity.

行动即性格。

学校必须与生活紧密相连，教育与劳动相结合。

You have to fight through some bad days to earn the best days of your life.

解释：向外物游览就要要求外物的完备，向自己内心求取，则能充实完善自身。

心灵是一个可以在多个层次上分析的复杂系统。

我不是一个完美的人。我从未声称自己是。