记忆:
ex 向外 + sert 加入 -> 向外加入 -> exert 施加
vt. 运用，发挥施以影响You can exert your authority， and I can refuse to obey.
你可以行使你的权力，而我也可以拒绝服从。
Don't exert yourself on meaningless things.
不要把自己的精力耗费在没有意义的事情上。
I was too tired to exert myself.
我太累了，不能勉强自己。
Why do so many people have such a strong need to exert control over others?
为什么那么多人特别想对别人施加控制呢
