Peter sprang erect, as wide awake at once as a dog, and with one warning cry, he roused the others.

彼得跳了起来，像只狗一样，一下子就清醒了，他发出一声警告的叫声，把其他人都吵醒了。

youdao

I spotted him at once as an American.

我一眼就看出他是个美国人。

youdao

Use them more than once as you write, but not in every sentence.

写作的时候多次使用这些词汇，但是不要在每个句子都用。

youdao

The new health secretary, Kathleen Sebelius, said the virus does not seem to be as severe as once thought.

VOA: special.2009.05.06

And somebody as a joke once asked her, "How do you feel living in this village after all these years?"

有个人开玩笑问她,"你在我们村住这么多年觉得怎么样"

耶鲁公开课 - 1871年后的法国课程节选

You have to touch each of the 16 elements once as I go across the blackboard to actually merge them together, alright.

为了将这16个元素,合并到一起,对每个元素都只会用到一次。

哈佛公开课 - 计算机科学课程节选

They had met just twice with Mr. Johnson in small groups and once as the board.

WSJ: Duke Energy Confronts a Lack of Trust

He was once as breathtakingly fast, agile and powerful as any boxer who has ever graced the ring.

NPR: Boxer Muhammad Ali Turns 65

It was once as high as 3, 800 meters and the surrounding area is constantly racked by seismic activity.

CNN: Keeping track of Etna's pulse