defender

The goalkeeper shouted instructions to the defenders to clear the ball from the penalty area.

(Chinese) 守门员向防守队员大声发出指令，要求他们将球从禁区清除出去。

As a central defender, his primary job is to mark the opponent's best striker.

(Chinese) 作为一名中后卫，他的主要工作是盯防对方最优秀的前锋。