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.
例句
Mr Thomas was suffering from depression...托馬斯先生患有抑郁癥。I slid into a depression and became morbidly fascinated with death.我陷入消沉，開(kāi)始對(duì)死亡有種病態(tài)的迷戀。
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蕭條（期）；不景氣
A depression is a time when there is very little economic activity, which causes a lot of unemployment and poverty.
例句
He never forgot the hardships he witnessed during the Great Depression of the 1930s.他永遠(yuǎn)不會(huì)忘記 20 世紀(jì) 30 年代經(jīng)濟(jì)大蕭條時(shí)期他所親眼目睹的困苦情形。
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凹陷;凹坑;洼地
A depression in a surface is an area which is lower than the parts surrounding it.
例句
...an area pockmarked by rain-filled depressions.密布著雨水洼的地區(qū)
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低氣壓
A depression is a mass of air that has a low pressure and that often causes rain.