improbable

It is highly improbable that the team will win the trophy given their current injuries.

(Chinese) 鉴于目前队员的伤情，这支球队赢得奖杯的可能性极小。

Finding a needle in a haystack is difficult, but not entirely improbable with a magnet.

(Chinese) 大海捞针固然困难，但如果用磁铁，也不是完全不可能。