活泼起来的英文：
brisk up

Make sb feel more cheerful or lively
使某人快活或活泼起来

He was a vigorous, brisk person.
他是一个强壮的，活泼有力的人。

She was very brisk and alert.
她完全是一副干脆利落、精神抖擞的神情。

The horse broke into a brisk trot.
马突然快步小跑起来。

Business brisked up.
生意兴旺起来了。

I believe that the market will brisk up.
我相信市场会兴旺起来。