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Custom is a second nature. 习惯是后天养成的。 Custom makes all things easy. 有个好习惯，事事皆不难。 Diamond cuts diamond. 强中自有强中手。 Do as the Romans do. 入乡随俗。 Do as you would be done by. 己所不欲，勿施于人。 Doing is better than saying. 与其挂在嘴上，不如落实在行动上。 Do it now. 机不可失，时不再来。 Do nothing by halves. 凡事不可半途而废。 Dont claim to know what you dont know. 不要不懂装懂。 Dont have too many irons in the fire. 不要揽事过多。 Dont make a mountain out of a molehill. 不要小题大做。 Dont put off till tomorrow what should be done today. 今日事，今日毕。 Dont put the cart before the horse. 不要本末倒置。 Dont trouble trouble until trouble troubles you. 不要自找麻烦。 Dont try to teach your grandmother to suck eggs. 不要班门弄斧。 | 
