单词学习：hair 名词
hair
/her/
头发；毛发；（植物、动物身上的）茸毛
Mr. Gu noticed a single gray hair on his student's head and smiled, remembering his own youthful days.
顾老师注意到他学生头上有一根白发，笑了笑，想起了自己的青春岁月。
单词卡片
卡片已就绪
