Radiocommunication
[电] 无线电通讯
🗣️ 情景例句
Learning any language takes a lot of effort.
学习任何语言都需要花费很多努力。
How much is the telephone bill a month?
每个月电话费要多少钱？
Even if you travel in ideal weather, sea journeys take a long time.
即使风平浪静，坐船旅行也要占用很长时间。