I do not need hair oil.

我不需要抹发油。

youdao

Your hair is all right; it's just that you need a haircut.

你的头发没问题，只是你需要理个发。

《柯林斯英汉双解大词典》

His hair was in need of a cut.

他需要剪头发了。

youdao

So I would choose something that have a wave lines off You wouldn't measure the dimension of a human hair with a yardstick, so I need something on this order.

所以我会选些东西,你将不会用一个码尺去量,人的头发有多大，所以我需要一些这个级数上的东西。

麻省理工公开课 - 固态化学导论课程节选

And three million more people a year need more hair-cuts, etc.

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In a perfect world barbers would not need a license to cut hair, lawyers would not need expensive law degrees, and teachers could enter the profession with whatever relevant life experience they had accrued.

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Meanwhile both countries have been developing new missiles, whose flight times a matter of minutes mean that, in a crisis, they will need to be held on a hair-trigger: to be launched on warning, or risk being lost to an incoming attack.

ECONOMIST: Nothing deterred