上下

上下 [shàng xià]

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

举国上下 the whole nation;

全家上上下下都很高兴。 All members of the family, old and young, are very pleased.

2. ■ （从上到下） from top to bottom; up and down:

这个水塔上下有50米。 The water tower is fifty metres high.

3. ■ （从高到低或从低到高） go up and down:

摩天楼里有电梯，上下很方便。 With an elevator in the skyscraper, we can easily go up and down.

4. ■ （程度高低） relative superiority or inferiority:

不相上下 equally matched; about the same;

难分上下 hard to tell which is better

5. ■ （用在数量词后面） about; or so; or thereabouts:

30岁上下 about thirty years old; thirty or so

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常用词组

1. ■ 上下配穴 {中医} coordination of the acupoints of the upper with those of the lower, superior-inferior point association;

2. ■ 上下钳口 bit (pl. bits);

3. ■ 上下升降 oscillation