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Not to grind a sword will rust; People don't learn to lag behind.
宝剑不磨要生锈；人不学习要落后。
youdao
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Do not wear a sword to rust; people do not learn to lag behind.
宝剑不磨要生锈；人不学习要落后。
youdao
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Do not wear a sword to rust; people do not learn to lag behind.
宝剑不磨要生锈；人不学习要落后。
youdao