他有一根头发用英语怎么说

"He has a strand of hair" 或 "He has a lock of hair" 是表示某人有一根头发的英文表达。其中"strand" 是指 "一缕"，"lock" 是指 "一串"。这些词都可以用来描述一根头发。

例句1: "He had a strand of hair that always fell across his forehead."（他总有一缕头发掉在他的额头上。）

例句2: "She twirled a lock of hair around her finger as she thought."（她一边思考一边玩弄着她的一串头发。）

来源：这些词都来自英语中的描述头发的词汇，是在英语中常用的表达方式。