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It is a silly fish that is caught twice with the same bait. 智者不上两次当
It is six of one and half a dozen of the other. 彼此彼此。
If one sheep leaps over the ditch, all the rest will follow. 榜样的力量是无穷的。
It is a poor mouse that has only one hole. 狡兔三窟。
Ill news never comes too late. 好事不出门,坏事传千里。
It is the first step that is troublesome. 万事开头难。