这不是一个不可能完成的使命。
他们别无选择，但这或许只是个不可能完成的使命。
They have little choice, but it may be a mission impossible.
这是一项不可能完成的使命，你把它戴在头上，也就这样。
It's like 'Mission: Impossible' - you pull it over your head one time and that's it.
他断定他的侄子再不会活着回到他面前，因为这根本就是个不可能完成的使命。
He felt quite certain that his nephew would never come back alive from the hopeless task.
他断定他的侄子再不会活着回到他面前，因为这根本就是个不可能完成的使命。
He felt quite certain that his nephew would never come back alive from the hopeless task.
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