Ringback
回铃声（电话服务）；有回铃音的电话
🗣️ 情景例句
I expect that I will be back on Sunday.
我预计星期日回来。
I haven't heard from him for a long time.
我很久没有收到他的信了。
It will certainly be very funny!
这戏肯定会非常有趣的。