遇到这样的对手几乎防不胜防。

Defence was well-nigh impossible against such opponents.

《牛津词典》

她领先紧随其后的对手12分。

She has a 12-point lead over her nearest rival.

《牛津词典》

他们是少年时代就相识的对手。

They are rivals who have known each other since boyhood.

《柯林斯英汉双解大词典》

Firms in perfect competition are price takers: they don't particularly have to worry about the actions of their competitors.

这些企业是价格接受者,他们不必担心,他们的竞争对手的策略

耶鲁公开课 - 博弈论课程节选

Why? Because no matter how the other firm, your competitor, prices you might have an incentive to undercut them.

为什么,因为不管你对手怎么定价,你总有想削弱他们的动机

耶鲁公开课 - 博弈论课程节选

The first one is Dr. Marvin Chun who teaches the Introduction to Psychology course in the fall and is my competition.

第一名是马文·春博士,他会在秋季教授心理学导论课程,也是我的竞争对手

耶鲁公开课 - 心理学导论课程节选