doldrums
n. 忧郁;赤道无风带
例句
The economy is in the doldrums.
经济毫无生气。
《柯林斯英汉双解大词典》
He's been in the doldrums ever since she left him.
自从她离开他以来,他一直很消沉。
《牛津词典》
The bond market normally revives after the summer doldrums.
债券市场通常在夏天萧条期后开始复苏。