Callsign
n. 通信呼号
🗣️ 情景例句
When you have a business meeting in the United States, come to the appointment on time.
当你在美国有商务会晤时，一定要按时赴约。
You mind your business, and I'll mind mine.
井水不犯河水。
How long did you live there?
你在那儿生活了多长时间？