Callsign
n. 通信呼号
🗣️ 情景例句
By the way, will we be able to get a refund on this cancellation?
顺便问一下，我们取消后可拿回定金吗？
Empty vessels make the greatest sound.
空桶响声大。
No, it isn't.It's a ruler.
不，不是，这是一把尺子。