secondary word

例句：

1. 1. The second-grade students are learningto read and write.
   二年级的学生正在学习阅读和写作。
2. 2. The secondary school is locatedin the city center.
   这所中学位于市中心。
3. 3. The secondary education system is designed toprepare students for university.
   中等教育系统旨在为学生大学入学做准备。