每日普通话 Daily Mandarin Chinese: A：Nín hǎo，wǒ shì jiǔdiàn kèfúbù de，ɡuò lái bānɡ nín huàn chuánɡdān。您好，我是酒店客服部的，过来帮您换床单。Hi, I’m from the hotel customer service department, and I’m here to change the bed sheet. B：Nǐ hǎo，máfan le。你好，麻烦了。Hi. Sorry for the troubles. www.e-Putonghua.com