Radioecho
无线电回波, 无线电反射信号
🗣️ 情景例句
And tell me where you are and what's happened.
告诉我你在哪里，发生了什么事？
Do you have some post cards?
你有明信片吗？
It looks like the moon. There are many different kinds of mooncakes.
它看起来像月亮。月饼的种类很多。