■ hair

通常是不可数名词，只用单数。

• His hair is black.他的头发是黑色的。

但是也可以作为可数名词指一根根的头发。

• So why has he got two blonde hairs on his jacket?那么为什么他外套上有两根金色头发呢？

• emergence
• emergency
• emergency 与 emergence
• emerge 与 immerge
• emigrant
• emigrant 与 immigrant
• empress
• end
• end
• ended
• ended 与 ending
• endemic
• endemic 与 epidemic
• endermic
• ending
• ending 与 ended
• end up
• end up 与 end
• endure
• enemy
• engage
• engagement
• engine
• engine 与 motor
• enjoy