1.The water that bears the boat is the same that swallows it up.
2.Old sin makes new shame.
3.Once bitten， twice shy.
4.One boy is a boy， two boys half a boy， three boys no boy.
5.Wet behind the ears.
6.One eyewitness is better than ten hearsays.
7.One man's fault is other man's lesson.
8.Out of sight， out of mind.
9.Pleasure comes through toil.
10.Pour water into a sieve.
11.Practice makes perfect.
12.Pride goes before， and shame comes after.
13.Promise is debt.
14.Rome is not built in a day.
15.Seek the truth from facts.