他只穿着睡衣，身上没有血迹。
He is wearing only nightclothes, and there is no blood on him.
如果地板上没有血迹，那么这就不能算是一场悲剧。
If there was no blood on the floor, then it wasn't a tragedy.
你一定在《犯罪现场调查》里看到神探们还原出来的犯罪现场，到处都是血迹，可是没有尸体。
You've seen it on TV. Crime scene investigators show up at what might be a murder scene. There are blood spatters-but no body.
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