up, 向上，beat, 击打。原为音乐术语，乐声激昂曲调，引申词义乐观的。

1. Neil's colleagues say he was actually in a joking, upbeat mood.

内尔的同事们说他实际上在说笑逗乐，心情不错。

2. Scientists remain upbeat about the information that will be gathered.

科学家对即将收集到的信息仍满怀希望。

3. The Defense Secretary gave an upbeat assessment of the war so far.

国防部长对目前的战事给予了乐观的评价。

4. The tone of the speech was upbeat.

这次讲话的语气颇为乐观。

5. The Chancellor's upbeat message that the Government had licked inflation for good was marred by more job losses.

总理乐观地声称政府已经一劳永逸地解决了通货膨胀问题，但更多人的失业却令这一消息大为减色。