| 1. | The birds perched upon the television aerial .
那些鸟栖在电视天线上。 |
| 2. | The birds perched on the television aerial .
鸟停在电视天线上。 |
| 3. | They erected a television antenna on the roof ..
他们在屋顶上竖起了电视天线。 |
| 4. | They erected a television antenna on the roof ..
他们在屋顶上架起了电视天线。 |
| 5. | Position the aerial for the best reception .
把天线安装在接收效果最好的位置上。 |
| 6. | These waves struck the antenna of a receiving station .
这些波碰到了接收台天线。 |
| 7. | So a separate rotating aerial is used for that purpose .
为此需要用一种单独的旋转天线。 |
| 8. | Scanning in declination may be achieved by tilting the aerial system .
进行赤纬扫描时，可以把天线倾斜。 |
| 9. | Power is being delivered along the wires which lead into the antenna .
沿着通往天线的导线有功率传输着。 |
| 10. | Radio astronomy today is armed with the largest antennas in the world .
射电天文学拥有世界上最大的天线。 |
