Just because you hear hoofbeats, don't assume zebras. 听见马蹄声 也不一定是斑马

307. What?
     怎么了
308. What made him fall with a nail gun?
     那他怎么会拿着射钉枪摔下来
309. He said he tripped.
     他说他绊倒了
310. Just because you hear hoofbeats, don't assume zebras.
     听见马蹄声 也不一定是斑马
311. Something caused him to lose
     一定有什么原因导致他失去
312. Consciousness and fall down the stairs.
     意识并且摔下楼梯
313. He could have a tumor.
     他可能有肿瘤

来自《实习医生格蕾 第一季 第四集 Grey's Anatomy S01E04》第 310 行