头发的头英语怎么说

头发的头在英文中叫做 "hairline"。
这个词的来源源于英文 hair（头发）和 line（线）。
例句：
My hairline has been receding since I was in my 20s. (我二十多岁就开始脱发了。)
She has a high hairline that makes her look very youthful. (她有一个很高的发际线，使她看起来很年轻。)
He was worried about his thinning hairline, so he started using a hair growth product. (他担心自己的发际线变薄，所以他开始使用毛发生长产品。)