他擅长跳舞英文怎么说

可以用 "He is good at dancing" 来表示他擅长跳舞。

来源：这是一种常用的英语表达方式，good at 是“擅长”的意思。

例句：

He is good at salsa dancing. (他擅长萨尔萨舞。)
She is good at tap dancing. (她擅长踢踏舞。)
He is good at contemporary dancing. (他擅长当代舞。)