R-f preselectors
[电] 射频预选器
🗣️ 情景例句
Good. Then you'll be here about five?
很好。那么 大约在五点左右来。
How much is a bus ticket?
公共汽车票要多少钱？
We had a long walk along the wall.
我们沿着城墙走了很长一段路。