...Mr Kennedy's opponent in the leadership contest. [+ in]

与肯尼迪先生争夺领导权的对手

He described the detention without trial of political opponents as a cowardly act.

他称未经审判就将政敌关押起来是懦夫之举。

Norris twice knocked down his opponent in the early rounds of the fight.

诺里斯在前几个回合中两次击倒对手。

He's the best opponent I've come across this season, a great player.

他是我本赛季遇到的最出色的对手，一位了不起的运动员。

...opponents of the spread of nuclear weapons. [+ of]

反对核武器扩散的人士

He became an outspoken opponent of the old Soviet system.

他成为旧的苏联体制直言不讳的抨击者。