n.萎靡不振，沮丧；下陷处，坑；衰弱；减缓 变形： 复数：depressions 双语释义：n.(名词)[U][C]忧伤,消沉,沮丧 a feeling of sadness and hopelessness[C]经济大萧条,不景气时期 a long period of seriously reduced business activity and high unemployment[C]凹陷,洼地 a part of a surface lower than the other parts[C]低气压(