So biomedical engineers have been working for many years on how to design replacement parts for joints like the hip: the artificial hip is the most well developed of those.

因此,生物医学工程师花了很多年时间,致力于设计像髋关节这样的关节替代品,尤以人工髋关节的研究最为成熟

耶鲁公开课 - 生物医学工程探索课程节选

Their yell at the top of the world seems to Sal something that calls for a replacement; it calls for some other prophet to come walking ragged towards them and make them fall silent with his word.

他们在世界之巅的叫喊对Sal来说,似乎是在要求一个代替者;,需要另一个先知衣衫褴褛地朝他们走来,用他的话让他们安静。

耶鲁公开课 - 1945年后的美国小说课程节选