那个穿黑色皮夹克的年轻人是演唱会现场最活跃的冲撞舞者。

The young guy in the black leather jacket was the most energetic ___mosher at the concert.

那些穿着黑色皮衣的年轻人都是摩斯族。

The teenagers in black leather jackets are all ___moshers.