| 1. | There may be a "black out" of radio signals over a large area for several hours .
在大面积上的无线电讯号可能发生数小时的停顿。 |
| 2. | This radio signal has a frequency of 800000 cycles per second
这个无线电讯号的频率是每秒八百千周。 |
| 3. | An electronic device that converts one frequency of a radio signal to another
变频器将无线电讯号从一种频率转换成另一种频率的电子装置 |
| 4. | It was a very 33 ) risky flight , as she depended on radio 34 ) signals to find her way
那是一趟极危险的飞行，因为她得依赖无线电讯号来寻找方向。 |
| 5. | To enable long - distance communication , many telecommunication systems transmit radio signals via the ionosphere
在长距离通讯上，大多数通讯系统利用电离层来传递无线电讯号。 |
| 6. | To enable long - distance communication , many telecommunication systems transmit radio signals via the ionosphere
在长距离通讯上，大多数通讯系统利用电离层来传递无线电讯号。 |
| 7. | Furthermore , the most advanced adaptive arrays can take advantage of the multipath phenomenon to focus radio signals still further
不仅如此，最先进的适应型阵列还可以利用这种多路径现象，进一步集中无线电讯号。 |
| 8. | But when poachers carrying rifles or machetes traipse by a detector , it will send a radio signal to a treetop antenna
而当偷猎者携带步枪或弯刀行走到探测器附近的时候，探测器就会发送一个无线电讯号到树顶的天线上。 |
| 9. | Electromagnetic waves produced by solar flares may disturb the ionosphere and interfere with radio signals , resulting in degraded communication quality
太阳耀斑放出的电磁波会引致电离层急剧变化，干扰无线电讯号，大大降低通讯的质素。 |
| 10. | Electromagnetic waves produced by solar flares may disturb the ionosphere and interfere with radio signals , resulting in degraded communication quality
太阳耀斑放出的电磁波会引致电离层急剧变化，干扰无线电讯号，大大降低通讯的质素。 |
