一、at once adv.立刻;立即;同时;一起
二、right away 就;立刻，马上;当时
三、in a minute 马上，立刻
立刻，马上：immediately
英语例句：
1、Having played football for an hour, the boy was dusty and dirty and went to wash immediately.
那个男孩玩了一个小时足球，满身灰尘，便立刻去洗干净。
2、\"They lit up immediately,\" she said.
“他们立即站了起来”，她说。
