You can learn that only in the school of hard knocks.

你只有从经验中才能学到那个.

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Lisa: The school of hard knocks . Shawn was a model student.

莉莎: 艰苦学校,尚伟是个模范生.

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His brother never went to college; he educated in the school of hard knocks.

他的兄弟从来没上过大学; 他是从实际生活中锻炼出来的.

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They graduated from the school of hard knocks, and that experience helped smooth their rough edges.

他们在艰苦的学校毕业了, 经验磨去了他们的棱角.

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