Callsigns
(callsign 的复数) n. 通信呼号
🗣️ 情景例句
He never speaks unless he is spoken to.
除非别人先对他开口，他从不先开口。
The sea refuses no river.
大海有能容之量。
The ice is hard enough to skate on.
冰已经厚得可以划冰了。