与美国小学生一起学英文第4册 第12期:天线
时间：2019-01-10 作者：英语课 分类：与美国小学生一起学英文第4册
英语课
An antenna is used for radio, television, radar 2 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。
Antennas 3 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。
n.触角，触须；天线
- 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。
n.雷达，无线电探测器
- 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。
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小学英语