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at once 马上,立刻

all at once 突然

  • "And because small retailers don't have economies of scale to be able to order a lot of merchandise at once, they are not able to negotiate the best prices or offer the best deals to their shoppers."

    VOA: standard.2009.12.20

  • Well, "The wonder is I didn't see at once" and that is the grave that he has made for their child.

    奇迹的是我曾经看不见“,是他为他们的孩子准备的坟墓。

    耶鲁公开课 - 现代诗歌课程节选

  • People can't pay that, if they're in any trouble, they can't come up with the whole value of the loan all at once.

    如果人们遇到困难,将无法一次性凑齐这笔大额款项

    耶鲁公开课 - 金融市场课程节选

  • What you'll actually find in terms of asking your TAs about the Lewis structure rules is that sometimes they won't be as good at them as you are, and the reason is once you've drawn enough of these structures, you start to get a lot of chemical intuition about it just looks wrong to you if it's wrong.

    其实如果大家去问助教,路易斯结构的规则是什么的话,你会发现他们有时候可能并不比你们记得更清楚,因为一旦你画过足够多的路易斯结构,你就会开始获得很多化学直觉,如果它是错的,那么对你来说它看起来就是错的。

    麻省理工公开课 - 化学原理课程节选

  • This has made it very clear that there has to be -if you announce anything you have to announce it all at once on a certain date and you can't have favored people that you give the announcement to.

    很明显的一点...,如果要宣布事项,就要选定某一天,而且,你宣布的消息,不能只针对某一人群

    耶鲁公开课 - 金融市场课程节选

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