One for all, all for one. 我为人人，人人为我。

　　she is always thingking of number one .她总是只想到自己的利益。

　　Once bitten, twice shy. 一朝被蛇咬，十年怕井绳。

　　first come, first served. 先到先招待。

　　by ones and twos/ twos and threes 三三两两地

　　It takes two to make a quarrel. 一个巴掌拍不响。

　　Two and two make four. 二加二等于四，非常明显地。

　　Thats no problem; its just as clear as that two and two make four.

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

　　six of one and half a dozen of the other. 半斤八两，差不多。

　　at sixes and sevens.乱七八糟，杂乱地。

　　A stitch in time saves nine. 一针及时省九针。

　　ten to one 十之八九，可能性很大。

　　He was one too many for me.我不是他的对手。

　　To look nine ways 斜眼看人。

　　Rightasninepence完好无暇。