没人知道火车为什么会脱轨。No-one knows why the train derailed.火车脱轨栽进了河里。The train derailed and plunged into the river.火车头在拐弯处脱轨.The engine of the train left the rails at a curve....
Why should anesthesiologists be concerned about nausea and vomiting?为什么麻醉科医生必须关注恶心与呕吐?Anesthesiologists started spinal anesthesia in the holding area instead of the operating room.麻醉医生在预备区开始脊髓麻醉,而不是手术室.Hense the followin...