She's grown her hair long.

她的头发留得很长。

youdao

Men were in jeans, and could wear their hair long too.

男性们穿着牛仔裤，并且头发也留的很长。

youdao

She wears her hair long.

她梳着长发。

《牛津词典》

Dylan is wearing false long hair and dancing around with a crowd of mostly younger people at a wild house party.

VOA: special.2009.12.25

his skin was very fair and he to an unusual degree wore his hair quite long.

他的皮肤非常白皙,他还不同寻常地留着很长的头发。

耶鲁公开课 - 弥尔顿课程节选

So like, I had blonde hair for a long time. I've just dyed it red.

我以前的头发是金色的。我刚染成红色。

忘不了的生日礼物 - SpeakingMax英语口语达人

Mr. McNamee wears his hair long, and favors tie-dye and Hawaiian shirts on stage.

WSJ: The Tech Investor Is With the Band: Roger McNamee and Moonalice

He kept his graying hair long, so it curled up near the ears, but age had thinned it on top.

NPR: Excerpt: 'Then We Came to the End'

Crowe is shapeless now, his complexion pasty, his hair long and lank.

NEWYORKER: State of Play