悲观bēiguān精神颓丧,对事物的发展缺乏信心(跟‘乐观’相对as opposed to ‘optimistic’}){pessimistic; gloomy and doubtful about the development of sth.}: ～失望{become pessimistic and lose heart; be disheartened}|～情绪{pessimism}|虽然试验失败了,但他并不～。{Although the experiment was a failure, he did not lose heart.}