one hundred and one thanks万分感激

have one thousand and one things to do日理万机;有许许多多的事情要做

a thousand and one ways to help千方百计

The third time is the charm第三次准灵

Number three is always fortunate三号一定运气好

All good things go by three一切好事以三为标准

seven virtues七大美德

seven deadly sins七宗罪

the seven gifts of the spirits七大精神

be in the seventh heaven表示非常幸福快乐）

the seventh son of a seventh son显要的后代

be at sixes and sevens乱七八糟

hit/knock sb. for six给某人以毁灭性打击

be six feet under死亡、入土

a nine days’ wonder轰动一时、过后即忘的事情

A stitch in time saves nine.及时医治一针省九针，及时处理事半功倍

be dressed up to the nines衣冠楚楚，打扮得很华丽；穿着讲究

to the nine十全十美

on cloud nine得意洋洋、高兴万分、心情非常舒畅

If you run after two hares you will catch neither.脚踏两条船，必定落空

One can not be in two places at once.一心不可二用

Better master one than engage with ten.会十事不如精一事

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.

一个和尚挑水吃，两个和尚抬水吃，三个和尚没水吃。

Two heads are better than one. 三个臭皮匠胜过一个诸葛亮。

Look before you leap. 三思而后行

go fifty -to fifty 二一添作五

four-letter words 粗俗的下流话

four-letter man 专喜使用粗俗下流话的人

a catch-22 situation 进退两难的境况

at the eleventh hour 在最后一刻

a drop in the ocean 沧海一粟

When three know it，all know it. 三人知，天下晓。

A fence needs the support of stakes，and an able fellow needs the help of three other people. 一个篱笆三个桩，一个好汉三个帮。

An inch of time is an inch of gold. 一寸光阴一寸金。

Two is company，three is a crowd. 两人成伴，三人不欢。

by ones and twos 三三两两

be at sixes and sevens 乱七八糟

one after another 接二连三

in threes and fours 三五成群

six of one and half a dozen of the other 半斤八两five-finger 三只手

be in two minds 三心二意

ten to one 十有八九