sixth-grade primary 小学六年级 ; 六年级小学
low-grade primary copper sulfide 低品位原生硫化铜
fifth grade primary school students 五年级小学生
low-grade primary copper sulfide ore 低品位原生硫化铜矿
high-grade primary school students'creativity 小学高年级儿童创造力
Grade One in Primary School 小学一年级
primary grade 主要等级
Primary school lower grade 小学低年级
Primary five grade 小学五年级时
He is a fourth grade primary school student in Hangzhou, Zhejiang Province.
他是浙江省杭州市一名小学四年级的学生。
Then I watched the third grade primary school students of "the Analects" reading class.
接着我又观摩了三年级小学生的《论语》朗读课。
Low grade primary school teachers got less professional requirements than the other two groups.
小学低年级教师的专业要求低，其它两类的专业要求相对要高。
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