Mary suffered from severe postnatal depression after the birth of her first child.
玛丽在第一个孩子出生后患有严重的产后抑郁症。
Mary is showing signs of severe depression.
玛丽有严重抑郁的迹象。
She's in a depression.
她正处于抑郁之中。
I suffer from depression during the winter.
我在冬天患有抑郁症。
A business cycle is a recurring succession of periods of prosperity and periods of depression.
商业周期是一系列反复出现的繁荣时期和萧条时期。