中级

例句：

1. 1. The students are at the middle level of their grades.
   学生们处于年级的中等水平。
2. 2. She has a middle-level job that she enjoys.
   她有一个中等水平的工作，她很喜欢。
3. 3. The company's management is at the middle level.
   公司的管理层处于中等水平。