与美国小学生一起学英文第4册 第12期:天线

 　　Antenna¹ 天线

　　An antenna is used for radio, television, radar² and so on. 天线用于广播、电视、雷达等等。

　　It works in air and under the water. 它适用于空中和水下。

　　Antennas³ send signals and receive signals. 天线发送和接收信号。

　　Antennas make those signals stronger, so people can listen to the radio better and watch TV more clearly. 天线使那些信号变得更强，因此人们能更好地听广播、更清晰地看电视。

　　Thomas Edison and Heinrich Hertz used antennas and developed them very well in the 1800s. 十九世纪，托马斯·爱迪生和海因里希·赫兹使用天线并很好地发展了它们。

1 antenna   

n.触角，触须；天线

参考例句：

• The workman fixed the antenna to the roof of the house.工人把天线固定在房顶上。
• In our village, there is an antenna on every roof for receiving TV signals.在我们村里，每家房顶上都有天线接收电视信号。

2 radar   

n.雷达，无线电探测器

参考例句：

• They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
• Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。

3 antennas   

[生] 触角，触须（antenna的复数形式）

参考例句：

• Marconi tied several antennas to kites. 马可尼在风筝上系了几根天线。 来自超越目标英语 第3册
• 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。