A barber learns to shave by shaving fools
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"a barber learns to shave by shaving fools" 的定义和意义

a barber learns to shave by shaving fools
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used to emphasize the importance of practice and experience in developing expertise, and the value of learning from mistakes

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Don't criticize the new intern so harshly, remember the saying - a barber learns to shave by shaving fools.
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