Preemergency
[计] 备用, 备急, 辅助
🗣️ 情景例句
Hello, my name is ... May I speak to ...?
喂， 我叫……我可以和……讲话吗？
How much is the telephone bill a month?
每个月电话费要多少钱？
This case doesn't belong to me!You've given me the wrong case!
这箱子不是我的！您给错了！