But some doctors say the CT scan exposes patients unnecessarily to harmful radiation, as much radiation as a patient might receive from 400 chest x-rays.

VOA: standard.2010.04.07

It's still 1, because you plus plussed the wrong symbol called X. So for now, take-away from this, don't do this.

它还是1，因为你自增的是那个错误的叫做X的符号,现在，拿走这个，不这样做。

哈佛公开课 - 计算机科学课程节选

Another way to represent a point in a plane is I've got a radius and I've got an angle from the x-axis, right, and that's a standard thing you might do.

平面上面的点的方法,也就是极坐标,上面那种方法其实是，如果你们喜欢我这么说的话,笛卡尔坐标表示法。

麻省理工公开课 - 计算机科学及编程导论课程节选

So you see what it is--it's a measure of how much x deviates from the mean, but it's squared.

你会看到,这个指标,衡量的是x与平均值的偏离,而且这里有个平方

耶鲁公开课 - 金融市场课程节选

It also tells you that if you compress the spring, compress it means x is now-- x is measured from this position, where the spring is neither compressed nor expanded.

它还能告诉你,如果压缩弹簧,压缩就意味着现在 x...,x 是从这个位置开始算的,在这个位置弹簧既没有压缩也没有伸长

耶鲁公开课 - 基础物理课程节选

Now in fact, this may come as a surprise to you, I don't have ESP, I'm not a character out of the X-Men, so you can't actually see brain waves emitting from my head, and my reasoning doesn't affect your reasoning.

事实上,这绝对是不可能的,我没有超能力,我也不是X-Men,所以你根本看不到我大脑发出的脑波,我的推理不会影响到你

耶鲁公开课 - 博弈论课程节选

And then from that start point, get the x-value. Same thing, from that instance, get the endpoint, from that end point get the x-value, square.

取得结束点，然后取得结束点的y坐标，然后求差开平方，然后同样求的y坐标。

麻省理工公开课 - 计算机科学及编程导论课程节选