Echoranging
回声测距法
🗣️ 情景例句
from the businessmen and the corporations of Riverdale.
Riverdale的商人和企业界的支持。
Don't mention it.
不必谢。
Zhou Lan, can I have a look at your copy of China Daily?
周兰，我可以看看你这张《中国日报》吗？