最后我想说的话是，如果您有儿子或者女儿正在为学习奋斗，请明了，不要用智力或者聪明这些词去激发你的小孩。
The bottom line is this, if you have a son or daughter who is struggling academically, be cognizant not to use the words, intelligent or smart to motivate your child.
需要提供多大程度的服务——哪里是底线——是经营者们从学习探索中得出的经验，聪明的企业家会发现在某些客户身上根本不值得浪费精力。
How much service to provide — and where to draw the line — is a learning experience for entrepreneurs, and smart ones realize there are customers who aren't worth the trouble.
“学习做这种事的唯一目的实际上只是作为一种思维锻炼，是一种方式来表示你是多么聪明，”他说。
"The only point of learning to do this kind of thing is really as a mental exercise, as a way of showing how smart you are," he said.
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