Preventing noise, electromagnetic radiation, and radioactivity pollution?

A vacuum is the only perfectly transparent medium; all others absorb some frequencies of electromagnetic radiation.

真空是唯一完全透明的媒质, 一切实物媒质都会吸收电磁波谱的一些波段.

Radio interference produced by electromagnetic radiation.

因电磁辐射而产生的无线电干扰.

The electromagnetic radiation pollution directly influences environment and human health.

电磁辐射污染直接影响环境及人体健康.

The understanding of electromagnetic radiation underwent particle theory, wave theory, wave-particle theory.

电磁辐射的认识经历了微粒说 、 波动说 、 波粒二象性的过程.

Electromagnetic radiation poses a potential hazard to human health.

电磁辐射具有潜在的健康危害.

Light is a form of electromagnetic radiation.

光是以电磁射线的形式存在的.

A specific range of wavelengths or frequencies of electromagnetic radiation.

波段,波带:电磁辐射的波长和频率的特定范围.

Remote sensing techniques are useful in ultraviolet, visible infrared, and microwave regions of the electromagnetic spectrum.

遥感技术是有用的在紫外 、 可看见的红外线和电磁波频谱的微波地区.

Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum.

扩频技术是在无线电电磁频谱中无条例管制的部分中竞争.

In fact, visible light is just a tiny fraction of the entire electromagnetic spectrum.

事实上, 可见光只是电磁波频谱中很小的一部分.

Explanation: This impressive color composite shows spiral galaxy M 81 across the electromagnetic spectrum.

说明: 这张令人影像深刻的彩色合成影像显示了通过了电磁波频普拍摄到的旋涡星系M81.

Number of Stars; Electromagnetic Spectrum Limit.

恒星数 、 电磁波谱极限.

Radio wave: Wave from the portion of the electromagnetic spectrum at lower frequencies than microwaves.

无线电波: 电磁波谱中比红外辐射频率更低的电波部分.

Television systems, which transmit 30 picture frames per second, must operate on a broad electromagnetic spectrum.

每秒传输30幅图象画面的电视系统, 它必须工作于宽带电磁波谱.

Zhang Wen-Xun , Engineering electromagnetism functional methods, Academic Press, 1990.

冯康, 《数值计算方法》, 国防工业出版社, 北京,1999.

Have furnace of television, sofa, freezer, electromagnetism, microwave oven, pan, reticle.

有电视 、 沙发 、 电电冰箱 、 电磁炉 、 微波炉 、 炒锅, 网线.

This interplay between mechanics and electromagnetism is less evident.

力学和电磁学的这种相互关系不太明显.

With CD 10 II type electromagnetism mechanism of CT 19 II type spring operation mechanism.

配用CD10II型电磁操动机构或CT19II型弹簧操作机构.

AIC uses gas or electromagnetism with higher thermal efficiency than traditional way.

爱可分燃气、电磁两种能源.但热效率较传统方式高.

We are naturally drawn to try out the same ideas on electromagnetism.

我们要在电磁学中检验同样的想法.