You just do. 我就是能

646. No.
     对
647. You know, you keep taking everything on faith.
     你总是无条件相信一切
648. How do you know what's real and what's not?
     你是怎么分辨真假的呢
649. You just do.
     我就是能
650. Some people would call this a relationship.
     有人会管这种关系叫交往
651. The kind where you exchange keys, leave your toothbrush over.
     交换钥匙 把牙刷留下之类
652. Who? Who would call it that?
     谁 谁这么叫

来自《实习医生格蕾 第一季 第八集 Grey's Anatomy S01E08》第 649 行