I don't know what I'm doing. 我不知道该怎么做

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
582. It's not that easy.
     没那么容易

来自《实习医生格蕾 第一季 第八集 Grey's Anatomy S01E08》第 579 行