大学英语：depression n.a period when there is little economic activity and many people are poor or withou

　　eg:Many people were idle during the depression.萧条时期，很多人都无事可做。

　　其他词义：being depressed;low spirits忧愁;沮丧;消沉

　　eg:He committed suicide during a fit of depression.他一时想不开，自杀了。

　　衍生：

　　depress v.①make(sb.)sad and without enthusiasm使(某人)忧愁，消沉，沮丧

　　eg:Wet weather always depresses me.我在阴雨天总是心灰意懒。

　　②make(esp.trade)less active使(尤指贸易)不活跃，不景气，萧条

　　eg:A rise in oil prices depresses the car market.油价上涨导致汽车市场不景气。

　　depressed adj.very unhappy沮丧

　　eg:She felt lonely and depressed.她觉得既孤单又沮丧。