You never know what vessels are involved. 你不知道会触碰到哪条血管

278. It's going to take 3 or 4 hours just to get around those nerves.
     光是绕开那些神经大概就需要三四个小时
279. I'd prefer to start in front,
     我更倾向于先做肺部
280. And then flip her.
     然后再做背部
281. You never know what vessels are involved.
     你不知道会触碰到哪条血管
282. How intertwined they are.
     以及它们缠绕的情况
283. I'm going to need a good head start.
     第一步要保险
284. I should really go with these spinal canals.
     我必须先从脊柱开始

来自《实习医生格蕾 第一季 第六集 Grey's Anatomy S01E06》第 281 行