She can get a cow valve? 她可以移植牛瓣膜吗

506. but they're really hard to find.
     但那很难找到
507. And then I realized Dr. Burke can transplant
     后来我意识到伯克医生可以用
508. a bovine mitral valve instead of the pig.
     牛心二尖瓣取代猪的做移植
509. She can get a cow valve?
     她可以移植牛瓣膜吗
510. Dr. Burke, Why wasn't this mentioned before?
     伯克医生 为什么之前没有跟我们提及
511. Dr. Karev.
     克莱夫医生
512. The bovine valve has only been an option the last few years.
     牛心二尖瓣是近些年才用于临床治疗

来自《实习医生格蕾 第一季 第八集 Grey's Anatomy S01E08》第 509 行