Ringback
回铃声（电话服务）；有回铃音的电话
🗣️ 情景例句
Fine. We were just wondering about this trunk.
好啦。我们正纳闷这只大衣箱呢。
David must figure on at least seventy strong men for support.
戴维至少须把七十个壮汉的协助计算进去。
which we may call respectively the tough and the gentle.
我们分别称之为强硬法和温柔法。