put two and two together 根据事实推理

    Two heads are better than one. 三个臭皮匠，顶个诸葛亮。

    There are no two ways about it. 别无选择；毫无疑问的

    be of two minds 三心二意

    in two shakes of a lamb’s tail (as quickly as possible) 马上；很快

    kill two birds with one stone 一石二鸟；一箭双雕

    Two wrongs don’t make a right. “错错不得对” 不能利用别人的错误来掩饰自己的错误

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

    give three cheers for (为...)欢呼三声(Hip, hip, hurrah!); (为...)三呼万岁

    six of one, half a dozen the other 半斤八两

    in seventh heaven 暗喻心情极为快乐、满足

    on cloud nine 高兴得飘飘然

    dress to the nines 穿着非常时髦华丽

    a hundred to one shot 百分之一的可能；表示可能性很小

    forty winks 打盹

    at the eleventh hour 最后一刻