普通话'.英文怎么说

Mandarin :The official national standard spoken language of China, which is based on the principal dialect spoken in and around Beijing.Also called Guoyo ,Putonghua
Mandarin 普通话：中国的官方标准语言，是以北京及其周围地区的主要方言为基础制订的也作 Guoyo,Putonghua

我看见书上的就是汉语拼音……

普通话
mandarin

mandarin --the official Chinese language