Give a man a fish and you feed him for a day; teach a man to fish and you feed him for a________

Give a man a fish and you feed him for a day; teach a man to fish and you feed him for a_________. (life, time)

Give a man a fish and you feed him for a day; teach a man to fish and you feed him for a_________. (life, time)
【正确答案】：lifetime

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