狮子主要属于伏击猎食者，所以一旦它们认为猎物已经发现它们，它们往往会放弃捕猎。

Lions are primarily ambush hunters, so when they feel their prey has spotted them, they usually give up on the hunt.

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所以一旦人们发现了其中一个，通常不会把它和后期所找到的弄混。

So when one is found, it's usually not confused with points made by later groups.

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你家里的运动探测器也会这样，所以小偷一旦进入屋内寻找可以偷的东西，就需要继续干扰。

So, too, would the motion detectors in your home, so the thief will need to continue jamming once he's inside and searching for things to steal.

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So once we cover it, it will then be fair game to ask these photoelectron spectroscopy or these photoelectric effect questions using the wavelength of the electron.

所以一旦我们涉及到它，问及光电子能谱或者,用电子的波长问及,光电效应是一样的。

麻省理工公开课 - 化学原理课程节选

So, once we figure out what our probability of backscattering is, we'll just raise that to the 1/2, and we'll multiply that by 12 . 20 centimeters.

所以一旦我们,知道了散射概率，我们开根号。

麻省理工公开课 - 化学原理课程节选

Okay, so once you reach 2 000 calories you don't want to put anything else in.

好的,所以你一旦摄入了2000卡路里,教授在上节课曾提到2000卡路里是正常成年人平均一天的卡路里需求量 你就不会再想吃别的东西了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选