上下 [shàng xià]

• • （职务、辈分上的高低） high and low; old and young:

    the whole nation;

    举国上下

    All members of the family, old and young, are very pleased.

    全家上上下下都很高兴。

  • （从上到下） from top to bottom; up and down:

    The water tower is fifty metres high.

    这个水塔上下有50米。

  • （从高到低或从低到高） go up and down:

    With an elevator in the skyscraper, we can easily go up and down.

    摩天楼里有电梯，上下很方便。

  • （程度高低） relative superiority or inferiority:

    equally matched; about the same;

    不相上下

    hard to tell which is better

    难分上下

  • （用在数量词后面） about; or so; or thereabouts:

    about thirty years old; thirty or so

    30岁上下

• 短语:
  • 上下配穴 {中医} coordination of the acupoints of the upper with those of the lower, superior-inferior point association;
  • 上下钳口 bit (pl. bits);
  • 上下升降 oscillation