at once

英 [æt wʌns]

美 [æt wʌns]

同时; 一起; 立即; 马上

同义词辨析

immediately at once instantly right away【导航词义：立刻，马上】

immediatelyadv. 即刻，马上

〔辨析〕

指毫不耽搁地，也可指某一事件刚一发生，另一事件便紧接着发生，中间几乎没有时间间隔。

〔例证〕

He answered the phone immediately.
他马上接起电话。
Crack an egg and separate the yolk immediately.
打一个鸡蛋，然后立刻将蛋黄分离出来。

at onceadv. 立刻，马上

〔辨析〕

词义同 immediately，强调一刻也不耽误，但常用于口语中。

〔例证〕

The little girl recognized her mum at once.
那个小女孩一眼就认出了妈妈。
Now, turn off the TV at once and do your homework.
现在立刻关掉电视去做作业。

instantlyadv. 立即，马上

〔辨析〕

词义同 immediately，但语气更强。

〔例证〕

The soldier who was shot in the chest died instantly.
那名胸部中弹的士兵当即死亡。
Thanks to the Internet, mail is now instantly available.
多亏有了因特网，邮件现在可即时接收。

right awayadv. 马上，立即

〔辨析〕

词义同 at once，可换用。

〔例证〕

I'll go and pick her up right away/at once.
我马上去接她。
I'll call her right away/at once.
我马上给她打电话。

adv

It's getting late. Run home at once.
天晚了，快跑回家去。
The meeting hall was seething at once.
会场上顿时沸腾起来了。
The place at once enraptured me
那个地方一下子把我迷住了。
In case you give me leave, I will start at once.
如果你许可，我立即就动身。
I recognized his voice at once.
我立刻听出了他的口音。
All at once I fell into a state of profound melancholy.
我立即陷入无限的愁思之中。
If they'd operated and pinned her arm at once, she might have healed by now
如果他们当时马上就给她的胳膊做手术并用钢针固定，她现在可能已经痊愈了。
When a mistake is discovered, it should be corrected at once.
发现错误应立即纠正。
On hearing that the new novel was published, he rushed at once to the bookshop for a copy.
听说那本小说出版了，他就迫不及待地跑到书店去买。
After the theatre let out, the street was at once thronged with people.
戏院散场以后，街上顿时挤满了人。