Echoranging
回声测距法
🗣️ 情景例句
Thanks. I'll see you Monday at the office.
谢谢。咱们星期一办公室再见了。
Would you like to go for a sight-seeing ride?
你想要去搭车观光吗？
and mechanical systems like a wound watch, or the sun,
像上紧发条的手表那样的机械装置，或太阳，