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| 31. | First, there is broadcast television, which reaches the masses through broad-based airwave transmission of television signals. |
| 第一类为广播电视，通过电视信号的宽带无线电波发射展现在大众面前； |
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| 32. | Concerning transmission(radio waves;light)by varying electrical and magnetic fields. |
| 说明有关通过交变电磁场来实现的传输（无线电波、光）。 |
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| 33. | Radio waves are similar to light waves except their wavelength is much greater. |
| 无线电波与光波相似，但无线电波的波长要长得多。 |
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| 34. | radio wave borehole penetration system |
| 井中无线电波仪 |
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| 35. | radiowave penetration instrument |
| 无线电波透视法仪器 |
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| 36. | radio-wave refractive index of air |
| 无线电波的空气折射率 |
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| 37. | Some scientists collect the radio waves from outer space by means of giant dish-shapde antennas. |
| 一些科学家通过巨大碟形的天线接收外层空间之外的无线电波。 |
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| 38. | Radio waves travel in straight lines. |
| 无线电波是直线传播的。 |
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| 39. | transmit(a signal,etc)by radio waves |
| 用无线电波发送（信号） |
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| 40. | CRPL (Central Radio Propagation Lab) |
| 中央无线电波传播实验室 |
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