Bad times make a good man.
艰难困苦出能人。
There is no royal road to learning.
求知无坦途。
Doubt is the key to knowledge.
怀疑是知识的钥匙。
Sharp tools make good work.
工欲善其事，必先利其器。
Wasting time is robbing oneself.
浪费时间就是掠夺自己。
Nurture passes nature.
教养胜过天性。
There is no garden without its weeds.
没有不长杂草的花园。
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