split second

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It took me a split second to decide that I could quickly sell our furniture and move.
几乎在一瞬间我就决定了，我可以卖掉家具搬过去。
While these steps are presented separately, the activities may all have to take place in a few moments, some in a split second.
这些步骤是一个个单独呈现的，但所有的行为可能会不得不在一会儿的功夫中全部发生，有些只是分隔的一秒。
A photograph that records a split second from a lifetime is a very thin slice indeed. How could it predict a divorce decades in the future?
然而一张照片上记录的只是一个人一生中短短的一瞬间，薄薄的一张照片怎么能预计十年后的一次离婚呢？

"Gives a rebel yell and hoot when he does manage to stand up for a split second,drops in on people, collides with people."
The trolley car is a runaway thing and you're making a split second choice.
电车已失控，而你必须在那一瞬间做出选择。
耶鲁公开课 - 公正课程节选
So, studies with police officers using reaction time in split-second choices on who to shoot find that your stereotypical attitudes play a huge role in who you're likely to shoot when they're holding an object in their hand that's unclear.
一些针对警察的研究,用霎间的反应时间让他们作出选择,应该向谁开枪，研究发现这些刻板态度,能极大的影响你选择向谁开枪,当他们手里拿着不明物体时。
耶鲁公开课 - 心理学导论课程节选

The result: for a split second, you are living the experience with Thoreau as it happens.
FORBES: A History Book, Tweet by Tweet