美 [ɔːl æt wʌns]
突然地；出乎意料地
同时；一起
all at the same time
同义词： all together
without warning
同义词： all of a sudden
... About nothing and everything 是关于无关紧要的事和所有事（也可以说成：其实没事，也有好多事。这得自己体会。） all at once 突然 I am one of the those 我是一个那些 ...
... and so on 等等 all at once 突然，忽然； at once 立刻，马上；同时，一起 once more／again 再 every other 每隔一个的 over and over (again) 一再 ...
... all at once突然；同时；一起 all but几乎；差一点 all in all总的说来；头等重要的 ...
突然
All at once she lost her temper.
她突然大发脾气。
All at once there was someone knocking on the door.
突然有人敲门。
She wanted to laugh and weep all at once.
她哭笑不得。
All at once, the Confederate artillery thundered with a deafening roar.
VOA : special.2009.11.05
bugs And if so, let's fix them all at once rather than one at a time.
让我们一次性全部修复这些,而不是一次修复一个。
计算机科学及编程导论课程节选 : 麻省理工公开课
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
金融市场课程节选 : 耶鲁公开课
"Our country's too big, too complicated, too decentralized for Washington, a few of us here, just to write a few rules about remaking seventeen percent of the economy all at once."
VOA : special.2010.02.27
And then she quickly strummed by playing all the strings at once.
VOA : special.2011.03.06
"Don't feel obligated to watch it all at once, " he told the Vulture website.
IMF, which will pay out in stages, not all at once, would not be amused.
ECONOMIST: Fresh IMF money may save the economy, at a high social cost
Mysteriously, the pillars appear to have been buried, deliberately and all at once, around 8200 B.