n.不可能之事；不可能
It was set down as an impossibility. 那被看作是不可能的事。
It is an impossibility for you to do so. 你那样做是不可能的事。
It is a physical impossibility to be in two places at once. 同时身处两地在自然法则上是不可能的。
Completely banning nuclear weapons is a virtual impossibility. 完全禁止核武器实际上是不可能的。
