I've never done a bovine replacement before. 我从未做过牛心二尖瓣移植术

575. What do you want?
     你想干嘛
576. Nothing. I just haven't seen you all day.
     没什么 我只是一整天都没看到你
577. So I'm working.
     我在工作
578. I've never done a bovine replacement before.
     我从未做过牛心二尖瓣移植术
579. I don't know what I'm doing.
     我不知道该怎么做
580. Look it up, research it
     查查资料 研究研究
581. and get someone to assist you.
     再找个人帮你

来自《实习医生格蕾 第一季 第八集 Grey's Anatomy S01E08》第 578 行