Some kind of a guide 当你越线时

798. Call it, Doctor.
     宣布吧 杨医生
799. Time of death, 11:43.
     死亡时间 11点43分
800. I wish there were a rule book for intimacy.
     亲密 要是有种规则该多好
801. Some kind of a guide
     当你越线时
802. that could tell you when you've crossed the line.
     能有个指导提醒你该多好
803. You can't lose it like that.
     你不用那么悲伤
804. It would be nice if you could see it coming.
     要是能事先预见它的到来该多好

来自《实习医生格蕾 第一季 第四集 Grey's Anatomy S01E04》第 801 行