at once adv.立刻;立即;同时;一起

right away 就;立刻，马上;当时

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。