be on a downer

• 感到沮丧

be on a downer的用法和样例：

例句

1. The bad news cast a chill over us all.
   这坏消息使我们大家都感到沮丧。
2. The surest way to disappoint him would be to ask him nothing.
   最能让他感到沮丧的方法就是不要再问他任何事。