To think smart, you must use reasoning.

要聪明地思考，推理是必须的。

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Ryan: I think smart people can tell the difference.

莱恩：我想聪明的人是能够看出区别的。

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The moral to this column is to think smart and economically.

本专栏的主旨是巧妙而经济地思考。

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The moral to this column is to think smart and economically.

本专栏的主旨是巧妙而经济地思考。

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