求翻译：系统实现了管理员对学生、教师以及课程信息的添加、查询、修改和删除等功能。实现了选课录入、学生成绩录入、学生成绩统计以及操作日志管理功能。是什么意思？

System administrators to students, teachers, and curriculum information to add, query, modify and delete functions. Course entry, the entry student achievement, student achievement statistics, as well as operation log management functions.

The system administrator for the students, teachers, and curriculum information, add, query, modify, and delete features. The choice of courses, student achievement in the entry, as well as student achievement statistics log management features.

The system has realized the manager to the student, the teacher as well as curriculum functions and so on information increase, inquiry, revision and deletion.Realized has chosen the class input, the student result input, the student result statistics as well as the operation diary management functi

System administrator added to the students, teachers, and curriculum information, query, modify, and delete functions. Realization of course selection, student achievement, student achievement statistics entry entry and log management functions.

system administrator for the students, teachers, and curriculum information, add the query, modify, and delete features. The choice of courses, student achievement in the entry, as well as student achievement statistics log management features.