查人人中国名人网尿素和尿素氮的区别:请翻译一下这句话
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/10 20:04:32
汉语属汉藏语系汉语族，有七大方言。现代汉语以北方方言为基础，北京语音为标准音。
The Chinese language belongs to the Sinitic branch in the Sino-Tibetan language family, and it contains seven major dialects. Modern Chinese is based on the northern dialect, with the BeiJing accent as the standard pronunciation.