hair在什么情况下是可数名词，什么情况不可数？

Question

如题所述

Answer 1

做“头发”这个整体概念的时候,不可数
。如
she
wears
long
hair.她蓄着长发；
强调几根头发的时候，是可数的；如
there
are
a
few
hairs
in
the
book.
书里有几根头发。

Answer 2

hair
n.
1.
毛发;兽毛[C][U][可数与不可数]
The
horse
has
a
fine
coat
of
hair.
这匹马长了一身好毛。
2.
头发[U][C][可数与不可数]
There
are
a
few
hairs
in
the
book.
书里有几根头发。
3.
些微,一点儿
The
ball
missed
his
head
by
a
hair.
球差一点击中他的头。