His business rivals knew they could expect no quarter from such a ruthless adversary.
他的业务对手都知道不可指望他这样无情的人会手软.
He is a shrewd and sometimes ruthless adversary.
他是个精明的、有时候冷酷无情的对手。
One who opposes and contends against another; an adversary.
对抗者, 对手, 敌手反对另一人及与另一人竞争的人; 对手
