They're a fairly good team - their only weak link is a relatively inexperienced goalkeeper.他们是一支相当强的球队——唯一的薄弱环节就是守门员相对来说经验不足。That is the only weak link in his reasoning.那是他推理中唯一的薄弱环节。He homed in on the one weak link in the argument.他把注意力集中在论据中的一个薄弱环节。It is the weak link in the company's line of products.这是公司系列产品的薄弱环节。