不要小孩的（形容词）

(adjective) Describing Individuals or married couples who voluntarily are without children. (NOTE: “childless” is considered negative, and so “childfree” is preferred usage)

EXAMPLE: My childfree brother and his wife are able to take overseas vacations every year.

我兄弟和他太太不要小孩，有条件每年去国外度假。

情绪低落（成语）

(IDIOM) Depressed; unhappy; emotionally low.

EXAMPLE: When I failed to get the promotion I wanted at work, I was so down in the dumps that for several days I considered leaving the company.

我没有获得所想要的提拔，情绪特别低落，一连好几天都想着离开公。