silent killer 无症状杀伤者(平时无症状而突然致死的病、如脑栓塞、心肌梗塞等)
- We know that oil can be a slow and silent killer.
我们知道,石油能成为缓慢而沉默的杀手。 - A silent killer lurks beneath the surface of this West African lake.
在这个西非洲湖泊的表面下潜藏着一个无声的杀手。 - It's sometimes called "the silent killer" because it has no symptoms.
它有时叫 "沉默的杀手",因为它来时根本没有症状。