Old English *beorhtnian "to make bright" (see bright (adj.) + -en (1)). Intransitive sense, "to become brighter," attested from c. 1300. Figurative use from 1590s. Related: Brightened; brightening.
权威例句
1. Hopefully it will brighten up, or we'll be coming back early.
希望天会放晴,否则我们就要提早回来。
2. Seeing him, she seemed to brighten a little.
看到他后,她似乎露出点儿喜色。
3. In the distance, the sky was beginning to brighten.
远方的天空开始泛白。
4. In the distance, the sky was beginning to brighten.
远方的天空开始泛白.
5. I've brought some flowers to brighten the place up a bit.