split end

a hair that has divided into several parts at its end

(发梢的)分叉

Dry, brittle hair and split ends were the unfortunate consequence of years of dyeing it peroxide blond.

头发干枯易断、发梢分叉是常年把头发漂染成金色的后果。

split hairs

to argue about small details of something

纠缠于细枝末节;在鸡毛蒜皮的事上争论不休

Don't split hairs. You know what I'm getting at.

不要钻牛角尖。你知道我是什么意思。