我小学二年级的时候，班上有30多个同学，上到小学五年级时班上就只有13个同学了。
When I was in the second grade of elementary school, there were more than 30 classmates in my classroom. But only 13 classmates could attend class in the fifth grade.
我小学二年级的时候，班上有30多个同学，上到小学五年级时班上就只有13个同学了。
When I was in the second grade of elementary school, there were more than 30 classmates in my classroom. But only 13 classmates could attend class in the fifth grade.
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