1.
They should also have middle-and lower-level schools.
还有中级的、初级的。
2.
Schools in the army are divided into those at higher, middle and lower levels.
学校有各级的：高级，中级，初级。
3.
The sixth of the nine orders of angels.
九级天使中的第六级
4.
The eighth of the nine orders of spiritual beings in medieval angelology.
第八级天使中世纪天使学中九级天使的第八级
5.
A person belonging to the middle class.
中产阶级属于中产阶级的一员
6.
Bourgeois:a person belonging to the middle class.
中产阶级:属于中产阶级的一员
7.
the highest of the four main Hindu castes: the priestly caste.
印度教四大世袭阶级中最高的一级；僧侣阶级。
8.
Lieutenants rank sergeants.
中尉的级别高于中士。
9.
Less advanced in organization or evolutionary development.
低级的在组织或进化发展中较低级的
10.
A class at an elementary school or the pupils in it.
班级小学的班级或其中的学生
11.
the social class between the lower and upper classes.
在社会等级中处于上等阶级和下等阶级之间的社会阶级。
12.
A high-ranking member of the clergy, especially a bishop.
高级教士牧师中的高级成员，尤指主教
13.
A step in a straight stairway.
（平行）梯级一段直楼梯中的一级
14.
The office of a reader at a university.
高级讲师职称大学中高级讲师的职称
15.
the class occupying the highest position in the social hierarchy.
社会级层中占最高地位的阶级。
16.
One of the second order of angels.
二级天使天使中的第二级
17.
"Enable the Advanced Settings item on the Advanced menu"
"启用“高级”菜单中的“高级设置”菜单项"
18.
the social class lowest in the social hierarchy.
在社会层级中，处于最下层的阶级。