Stronger than FM radio signals, these RF waves are still abillionth the intensity of known carcinogenic radiation like X-rays. (See pictures from an X-ray studio.)
这些射频电波比调频收音机信号要强，其强度大约相当于X射线这类致癌放射线的十亿分之一。
The structures of RDX/RF aerogel were characterized by atomic force microscopy(AFM), scanning electron microscopy(SEM), X-ray powder diffraction(XRD), and BET method.
用原子力显微镜（AFM），扫描电子显微镜（SEM），X 射线粉末衍射仪（XRD），BET 比表面积分析仪对其结构进行了表征。
Recently, by making use of RF screw system and X-ray monitor, the complications were significantly decreased.
随着RF系统的使用及术中采用X线监测，手术失误率明显降低。
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