无线电通话中的“ten four”准确含义是什么?为什么用“ten four”来表示?

不知道给你英文的解释是否可以,希望你在无线电以及英语方面都是专家：
A code used by CB owners possibly since the dawn of amateur radio,the code 10-4 simply means "Message received".Since the 70s the code system have been popular in law-enforcement circles then evolved to what it is today.Nowadays when people use these codes,they are mostly refering to the police radio code system,which is more detailed then its original version,so I'am only listing the police code system here rather than the out dated CB code version.
Please note that these code vary from one country to another or even used differntly in differnt state/province in the same country
10-0 Use Caution
10-1 You are being received Poorly
10-2 You are being received Clearly
10-3 Stop Transmitting
10-4 O.K.
10-5 Relay Message
10-6 Busy with Call
10-7 Out of service,(completely)
10-7b Out of service (personal)
10-7c Out of service (court)
10-7od Out of service (off duty)
10-8 In service
10-8ot In service (over time)
10-9 Repeat last message
10-10 Out of service,Radio on
后面还有,感兴趣的话可以参考我提供的链接.
下面的资料则介绍了American Navy的对讲机用语：
"What's your twenty?" in lieu of "Where are you?"------你在哪里?
"Give me your twenty" in lieu of "Tell me your location".------报告你的位置.
"Do you read me?" or "Do you copy me?" in lieu of "Do you get what I said?"------你听到我讲的话了吗?
Ten four!in lieu of "I got it" or "Copy"-------收到!