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all at once的音標(biāo)：all at once的英式發(fā)音音標(biāo)為：[?:l ?t w?ns]all at once的美式發(fā)音音標(biāo)為：[?l ?t w?ns]...

突然，同時...

All at once, Mick's serious expression softened into a grin.米克嚴(yán)肅的表情一下子變成了笑臉。All at once there was someone knocking on the door.忽然有人敲門。I feel terribly sleepy all at once.我突然覺得特別困。...