at once

All at once there was someone knocking on the door.

忽然有人敲门。

She says she must speak with you at once.

她说她必须立刻跟你谈谈。

You can't be doing two things at once.

不能一心二用。

I wrote back to Meudon at once to fix up a meeting.

我马上给缪顿回信安排会面。

The receptionist recognized him at once.

接待员一眼就认出他了。

I must speak to Tania at once.

我要马上跟塔尼娅讲话。

The boys all began to talk at once.

所有的男孩子们立即说起话来。

I feel terribly sleepy all at once.

我突然觉得特别困。

I have to go, I really must, at once.

我得走了，我真的必须马上就走。

The audience at once greeted him warmly.

观众立即对他作出了热情的反应。

Remove from the heat, add the parsley, toss and serve at once.

端离炉子，加上欧芹，颠起翻面后就立刻上桌。

From childhood, he was evidently at once rebellious and precocious.

从儿时起，他就明显地既叛逆又早熟。

All at once, Mick's serious expression softened into a grin.

米克严肃的表情一下子变成了笑脸。

The body was too badly decomposed to be identified at once.

尸体严重腐烂，难以马上辨明身份。

He took off at once and headed back to the motel.

他立刻离开，回到汽车旅馆。