2019学年度人教版必修三Unit4Astronomy--the science of the starsPeriod2Language points Key Words and 课件(15张)
2019学年度人教版必修三Unit4Astronomy--the science of the starsPeriod2Language points Key Words and 课件(15张)第2页

中国政府说他们可能将会建立一套社会 保障体系。 The Chinese government says maybe we will create a social security system. 电脑系统将有条理地进行工作。 The computer system will work in a systematic way.

1 system n.系统;制度;体制;方法