设x为a加b之和。
Can the value of y be predicted from the value of x?
能从x值推知y值吗？
The equation is impossible for any value of x greater than 2.
当x的值大于2时，这个等式不成立。
The possible permutations of x, y and z are xyz, xzy, yxz, yzx, zxy and zyx.
x、y和z的可能的组合方式为xyz、xzy、yxz、yzx、zxy和zyx。
这是y，这是x。
Figure 3 shows the supported mobile Web devices: BlackBerry 8300 and 8800 series, and the iPhone 2.x and earlier.
图3显示了受支持的移动Web设备：BlackBerry 8300和 8800系列，以及iPhone 2.x及更早期款式。
Take for example my friend Miss x.
就以我的朋友X小姐为例吧。
X-rays can penetrate many objects.
X射线能穿透很多物体。
He had to have his chest X-rayed.
他得进行胸部X光检查。
She was advised to have an abdominal X-ray.
她被建议拍个腹部X光片。
The doctor studied the X-rays of her lungs.
医生研究了她肺部的X光照片。
It will only register on sophisticated X-ray equipment.
只有在先进的X光设备上它才会显示出来。
A clerk had slipped the wrong tab on Tony's X-ray.
一位职员失手把一个错误的标签贴到了托尼的X光片上。
X-rays have confirmed that he has not broken any bones.
X光片已经证实他没有骨折。
I suggested that he rest, and sent him for an X-ray.
我建议他休息，并叫他去作一次X光检查。
The creators of the original X-Men abbreviated the title of its sequel to simply X2.
第1部《X战警》的创作者们把其续集的片名缩写成简单的《X2》。
Passengers must pass through metal detectors, and their carry-on bags are put through X-ray machines.
乘客必须通过金属探测器检测，其随身物品也必须经过X射线设备检测。
You might still want to go for an X-ray, however, just to be on the safe side.
但你也许还想去拍张X光片，为保险起见。
The airline had not been searching unaccompanied baggage by hand, but only screening it on X-ray machines.
这家航空公司一直没有手工检查非随身行李，只是在X光机上检查。
We drove the cars into an X-ray tunnel for X-ray.
我们把车开进X光隧道进行X光检查。
我需要进行X光检查。
让我们做个X光检查吧。
医生，这是我的X光片。
安迪，你需要进行X光检查。
你应该进行X光检查。
They can't tell till they X-ray.
在使用X光检查之前，他们还不能判断。
大夫，我需要进行X光检查吗？
The element was found using X-ray spectroscopy.
这种元素是利用X 射线光谱学发现的。
我们需要对你进行X光检查。
He had two X-ray burns on the back.
他背上有两处地方被X射线灼伤。
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