hair是可數名詞還是不可數名詞

　　例句：

　　1、She walked forward and embraced him and stroked his tousled white hair.

　　她走上前擁抱他并輕撫他凌亂的白發。

　　2、Applying the dye can be messy, particularly on long hair.

　　涂抹染發劑可能會搞得一團糟，特別是長發。

　　3、His long, uncovered hair flew back in the wind.

　　他那露在外面的長發隨風向后飛舞。

　　4、He was a tall, thin man with grey hair.

　　他是個瘦高個，頭發灰白。