小学科学调查
elementary science survey
小学科学计画
elementary school science project
小学科学教育
elementary science education
science education in primary school
国小自然科教学评量
elementary science classroom assessment
科学评估小组
Panel for Scientific Assessment
中国科学院生态环境研究中心国情小组
ecological environment research center
Chinese Academy of Sciences
最小科学卫星
minimum scientific satellite
Satellite
minimum scientific
北京大学数学科学学院
department of information science
School of Mathematical Sciences
peking university
北京市环境保护监测中心；北京大学数学科学学院
beijing environmental protection monitoring centre