One hundred and one thanks
have one thousand and one things to do day; There are so many things to do
a thousand and one ways to help千方百计
The third time is the charm's third quasi-spirit
Number three is always fortunate number three must be lucky
All good things go by three All good things are standardised by three
Seven virtues seven virtues
Seven deadly sins
the seven gifts of the spirits七大精神
be in the seventh heaven means very happy and happy)
The seventh son of a prominent descendant of a seventh son
Be at sixes and sevens mess
hit/knock sb. For six give someone a devastating blow
Be six feet under death, into the ground
a nine days' wonder is something that is sensational and forgetful after a while
a stitch in time saves nine
Be dressed up to the nines dressed up, gorgeously dressed; well dressed
To the nine perfect
On cloud nine is triumphant, happy, and in a very good mood
If you run after two hares you will catch neither
One can not be in two places at once
Better master one than engage with ten
kill two birds with one stone一箭双雕
a fall into the pit，a gain in your wit.吃一堑，长一智。
one boy is a boy，two boy half a boy，three boys no boy.
One monk carries water to eat, two monks carry water to eat, and three monks have no water to eat.
two heads are better than one. Three stinky cobblers are better than one Zhuge Liang.
look before you leap. Look before you leap
go fifty -to fifty two one plus five
Four-letter words vulgar vulgar words
Four-letter man specializes in people who use vulgar and vulgar words
a catch-22 situation is a dilemma
at the eleventh hour at the last minute
a drop in the ocean 沧海一粟
when three know it，all know it. Three people know, the world knows.
a fence needs the support of stakes，and an able fellow needs the help of three other people. One fence three piles, one good man three gangs.
an inch of time is an inch of gold. 一寸光阴一寸金。
two is company，three is a crowd. Two people are together, and the three are not happy.
by ones and twos three three two twos
Be at sixes and sevens mess
One after another
In threes and fours in groups of three or five
six of one and half a dozen of the other 半斤八两five-finger 三只手
Be in two minds half-hearted
Ten to one out of ten