Definition: used to mean that something is happening that does not usually happen Level: B2
就这一次，公交车准时到了。
___For ___once, the bus was on time.
就这一次，我们被魔法本身拥抱了。
___For ___once, we were embraced by magic itself.
就这一次，他会议早到了。
___For ___once, he arrived early for the meeting.
