| 1. | Radio waves travel in straight lines .
无线电波是直线传播的。 |
| 2. | The universe is bathed in a sea of radio waves .
宇宙浸泡在无线电波的海洋中。 |
| 3. | The original current set up by the radio waves is very feeble .
无线电波产生的初始电流很弱。 |
| 4. | Transmission can be done by cable, radio frequency and satellite .
传递可通过海底电缆，无线电波和通信卫星来进行。 |
| 5. | Of the wealth of information radioed back, a few items are especially notable .
无线电波发回的大量信息中，有几条是特别令人注目的。 |
| 6. | The highly sophisticated electronic methods rely on either light or radio wave propagation .
较复杂的电子技术是利用光或无线电波传播。 |
| 7. | Do any of these radio waves sweeping through space to the earth contain a message ?
在飞越空间到达地球的这些无线电波中，是否可能有一些电波包含着某一种信息呢？ |
| 8. | This high frequency alternating current produces the high frequency radio waves mentioned in the previous chapter .
这种高频交流电流产生前一章提到过的高频无线电波。 |
| 9. | The radiant energy used in such measurements may vary from x rays, through visible light, to radio waves .
测定过程中采用的光能种类很多，从X射线，可见光到无线电波。 |
| 10. | Such a reflecting layer, together with the sea, could channel radio waves from one side of the atlantic ocean to other .
这种反射层和海洋一起，能把无线电波从大西洋的此岸送到彼岸。 |
