at once

a) IMMEDIATELYimmediately or without delay 立刻，马上

Now, go upstairs at once and clean your room!

现在立刻上楼去打扫你的房间！

When I saw him I recognized him at once.

一看到他我就认出他了。

b) TIME/AT THE SAME TIMEtogether, at the same time 一起，同时

I can’t do two things at once!

我不能同时做两件事！

Don’t all talk at once.

不要同时发言。

In everyday English, when people mean 'immediately', they usually say right away or, in British English, straight away rather than at once: 在日常英语中，人们表示 “立刻” 时一般说right away或straight away(英国英语)，而不说at once

I recognized him right away.

我立刻认出了他。

Examples from the Corpus

at once• I can't do two things at once!• I can't understand what you're saying when you both talk at once.• You're trying to do too many things at once.• Everyone knew at once how serious the situation was.• Anyone know the answer? Don't all shout at once, put your hand up.• You can't have three weeks' holiday all at once, you'll have to take them separately.

→ at once at once1(2)

词汇	at once
释义	at once at once a) IMMEDIATELYimmediately or without delay 立刻，马上 Now, go upstairs at once and clean your room! 现在立刻上楼去打扫你的房间！ When I saw him I recognized him at once. 一看到他我就认出他了。 b) TIME/AT THE SAME TIMEtogether, at the same time 一起，同时 I can’t do two things at once! 我不能同时做两件事！ Don’t all talk at once. 不要同时发言。 Register In everyday English, when people mean 'immediately', they usually say right away or, in British English, straight away rather than at once: 在日常英语中，人们表示 “立刻” 时一般说right away或straight away(英国英语)，而不说at once I recognized him right away. 我立刻认出了他。 Examples from the Corpus at once• I can't do two things at once!• I can't understand what you're saying when you both talk at once.• You're trying to do too many things at once.• Everyone knew at once how serious the situation was.• Anyone know the answer? Don't all shout at once, put your hand up.• You can't have three weeks' holiday all at once, you'll have to take them separately. → at once at once1(2)
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