Calcein
钙黄绿素
🗣️ 情景例句
Emergency Assistance, may I help you?
紧急事故救援中心，有什么需要帮助的吗？
I'm sorry to have kept you waiting.
很抱歉，让你久等了。[分词作状语]
OK. I'll ring you if I have any news.
好吧。一有消息我就给你打电话。