-something

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suffix informal

used after a number like 20, 30, etc. to refer to the age of a person who is between 20 and 29, 30 and 39 years old, etc., or to a person who is of this age

(用于数字后指年龄或某个年龄段的人)…多岁，…多岁的人

I'd guess she's thirty-something.

我猜她三十多岁。

Most of these places are aimed at twenty-somethings.

这些地方大多数是以二十多岁的人为目标群体的。