名词

1. 抑郁;沮丧;消沉
Depression is a mental state in which you are sad and feel that you cannot enjoy anything, because your situation is so difficult and unpleasant.

2. 萧条（期）；不景气
A depression is a time when there is very little economic activity, which causes a lot of unemployment and poverty.

3. 凹陷;凹坑;洼地
A depression in a surface is an area which is lower than the parts surrounding it.

4. 低气压
A depression is a mass of air that has a low pressure and that often causes rain.

1. pushing down

e.g. depression of the space bar on the typewriter

2. sad feelings of gloom and inadequacy

3. a sunken or depressed geological formation

Synonym: natural depression

4. angular distance below the horizon (especially of a celestial object)

5. a concavity in a surface produced by pressing

e.g. he left the impression of his fingers in the soft mud

Synonym: impressionimprint

6. a state of depression and anhedonia so severe as to require clinical intervention

Synonym: depressive disorderclinical depression

7. a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity

8. a long-term economic state characterized by unemployment and low prices and low levels of trade and investment

Synonym: slumpeconomic crisis

9. an air mass of lower pressure
often brings precipitation

e.g. a low moved in over night bringing sleet and snow

Synonym: low