Radioecho
无线电回波, 无线电反射信号
🗣️ 情景例句
Where will you be living during your stay here?
你在此期间打算住哪里？
We have every reason to cancel the contract because you've failed to fulfil your part of it.
我们完全有理由取消合同，因为你们没有完成应遵守的合同内容，履行合同。
He's not in his office at the moment.
他现在不在办公室里，