You have to work hard to get what you want.
利用不同的感官刺激,有条不紊地将注意力引导到儿童的活动甽,即便是嗅觉也可以用理解的方式来训练,从而成为他们探索环境的器官。
"The only thing to do with good advice is to pass it on. It is never of any use to oneself."