突然间，他站起来走出了房间。

___All ___at ___once, he stood up and walked out of the room.

突然间，一切又开始正常运作了。

___All ___at ___once, everything started to work again.

突然间，她意识到了事情的真相。

___All ___at ___once, she realized the truth of the matter.