It's actually his time of death. 从而确定是真实的死亡时间

197. That's why we do a series of tests over a number of hours.
     所以我们要花好几个小时做一系列测试
198. So when we call time of death,
     当我们宣布死亡时间时
199. We know that we've done everything to make sure
     我们已经竭尽全力
200. It's actually his time of death.
     从而确定是真实的死亡时间
201. That there isn't gonna be any miracles.
     不会再发生任何奇迹
202. This is the hard part.
     确实让人很难受
203. To stand around as surgeons and not cut.
     作为外科医生 却束手无策

来自《实习医生格蕾 第一季 第三集 Grey's Anatomy S01E03》第 200 行