每日英语：聪明的承诺
聪明的承诺One day a father was teaching his son and said,
"The keys to your success are keeping your word and cleverness. Once you give somebody a promise, you must carry it out no matter what will happen. This is called 'keeping one's words."
"What is clever?" asked his son.
"Clever is that you'll never make such a promise, " the father answered.
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