My dentist-guide also described her work spreading “sanitary propaganda” – that is, visiting local grade schools to teach children how to brush their teeth. But, she noted, many could not even afford toothbrushes.
我的牙医导游还描述了她的“卫生宣传”工作——即去本地小学指导孩子们如何刷牙。但是，她指出，许多孩子根本买不起牙刷。我丝毫不知道，我兜里的这盒牙线——没几天好用——是这么值钱。