无线电波是指在自由空间(包括空气和真空)传播的射频频段的电磁波。无线电波的波长越短、频率越高,相同时间内传输的信息就越多。 无线电波在空间中的传播方式有以下情况:直射、反射、折射、穿透、绕射(衍射)和散射。
n. airwave
misc. radio wave
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愈来愈多的电视台和广播电台使无线电波段愈来愈拥挤。
More and more TV and radio stations are crowding the airwaves.
他们的仪器探测到了频率为3千赫的非常微弱的无线电波。
Their instruments detected very faint radio waves at a frequency of 3 kilohertz.
这场竞选大战不是在街头集会中进行,而是在无线电波中交锋。
The election campaign has been fought not in street rallies but on the airwaves.
My point here is not to say, oh, you idiot, Plato, why didn't you think of radio waves?
我这里不是想说,柏拉图,你真傻,你为什么没想到无线电波呢?
If you hook a radio wave up with a radio, you can tell the radio wave was there because what the radio is doing?
如果你用收音机检测无线电波,你可以知道无线电波在那,因为收音机在干什么?
You turn on your radio, the radio waves passing by, boom, properly tuned, you detected it.
你打开收音机,无线电波传出来,好好地调试一下,你就检测到它了。
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