The students of grade 3 and 4 will take the required courses according to the last classgrouping and the other courses according to course-selection system.
高三、 高四年级学生开学后按上学期的分班情况正常上大课，其余科目将按照选课进行走班制。
2
A mechanism for grouping related functionality into logical "modules" which encapsulate implementation details - i.e. mechanism to define a Class.
l一种将相关函数组织在一个模块中，并封装他们实现细节的机制。比如：类。
3
The new grouping of classes means larger numbers in each class.