Less obvious but just as real, is the infrared radiation emitted by the surface, and by the air.
由地面及空气发射的红外辐射虽不如它明显,然而却同它(可见光)一样实际存在着。
NBI changes the white light normally emitted by the colonoscope to a bluish light, providing a narrower wavelength and enhancing visual contrast of the surface structure of the colon.
窄带成像技术将结肠镜常规发射的白光改变为蓝光,以此提供一个较窄的波长,加强结肠表面结构的视觉对比度。
The microwaves emitted by the radar station could penetrate the Earth's surface - which means it would be able to see not only land, but under the sea and underground as well.
雷达站发射的微波可以穿透地球表明,这意味着不仅可以看到陆地,还能看到海底和地底的情况。
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