to become or cause someone to become happier, more energetic, or more active

She perked up as soon as I mentioned that Charles was coming to dinner. 我一提到查尔斯要来吃晚饭她就来了精神。

He perked up at the news. 一听到这消息他就振作了起来。

Would you like a cup of coffee? It might perk you up. 你想喝杯咖啡吗？也许能给你提提神。

to improve or become more exciting

Prices perked up slightly before the close of trading. 股票价格在收盘前稍微涨了一些。