1、在上课
...at sb's service听某人吩咐；任凭某人使用at school在学校；在上课；在求学at sea在海上（航行）；茫然，困惑 ...
2、在学校
...talk with / to sb.不某人谈话at school 在学校、在上课go to school 去上学 ...
3、在校
...after school放学后at school在校late for school上学迟到 ...
at primary school在小学
students at a school学生在学校;在校学生
at our school在我们的学校;详细翻译
At xingzhi School在行止学校;在行知学校
at Junior School在初中
at the school cafeteria在学校食堂
At Some School在一些学校
students at technological school技校学生
at the school shop在学校的商店里