secondary aneurysm

例句：

1. 1. The second-grade students are preparing for the upcomingexams.
   二年级的学生正在为即将到来的考试做准备。
2. 2. The secondary school is locatedin a quiet neighborhood.
   这所中学位于一个安静的社区。
3. 3. The secondary education systemis designed to prepare students for university.
   中等教育系统旨在为学生准备大学入学考试。