英 [dɪˈpreʃn]，美 [dɪˈprɛʃən]
指一种情绪低落、悲观且缺乏活动的心理状态。
一种医学病症，患者会极度不开心，无法过正常生活。
经济活动极少，导致大量失业和贫困的时期。
表面上比周围部分低的区域。
通常会导致降雨的低气压团。
在天文、测绘领域指的是俯视角。
depressions
great depression：[经]（1929年）大不景气，大萧条
mental depression：精神抑郁
clinical depression：[心理学]临床忧郁症
economic depression：[经]经济萧条
postpartum depression：产后忧郁症，产后抑郁
tropical depression：[气象]热带低气压；热带气旋
angle of depression：[医]低降角
slump
encouragement, inspiration
Mr. Thomas was suffering from depression. 托马斯先生当时正受抑郁症折磨。
He never forgot the hardships he witnessed during the Great Depression of the 1930s. 他从未忘记20世纪30年代经济大萧条时期他所目睹的艰辛。
...an area pockmarked by rain-filled depressions. …一个到处都是积满雨水的洼坑的地带。
To the northwest lies a depression with clouds and rain. 西北方向有一个云雨密布的低气压。
She was suffering from depression after a miscarriage. 她流产后患了抑郁症。
He showed no signs of depression over the result. 对于这一结果，他没有显示出任何抑郁的迹象。
Roughly speaking, I think we are heading for the depression. 大体说来，我认为我们正走向萧条。
Rainwater collects in shallow depressions on the ground. 雨水积在地上的浅坑里。
A depression is moving in from the east. 低气压从东边逼近。
On campus, he quickly found that beyond ordinary counselling, the university had no services for students who were undergoing physical rehabilitation and suffering from depression like him. 在校园里，他很快发现在普通的心理辅导之外，大学对于经受身体复原并且遭受抑郁的同学，比如他自己，没有什么服务。