she's not going to be able to register for her new classes.
她就不能报名新课程

It takes a very long time to abolish classes.
消灭阶级，要很长的时间。

The exploiting classes and systems should be abolished over the world.
应该消灭世界上的一切剥削阶级和剥削制度。

He could not account for his absence from classes.
他说不出缺课的原因。

His excuse for his absence from classes is not valid.
他缺课的理由是站不住脚的。

Xiao Ming doesn't like math classes, he is always absent-minded in these courses.
小明不喜欢数学课，经常在数学课上跑神儿。

They begin to sleep during the class or even absent for classes.
他们开始睡在课堂或甚至缺席类。

You can't pass the exam if you're often absent from classes.
如果你常常缺习的话，你不可能通过考试。

The classes given by the teachers are excellent. I get absolutely absorbed in my studies.
班由教师是优秀的。我完全沉浸在的。

Derived classes of the abstract class must implement all abstract methods.
抽象类得派生类必须实现所有抽象方法。

All abstract classes must be base classes.
所有得抽象类都应当是基类。

Abstract base classes are quite elegant to encapsulate calling conventions.
抽象基类很优雅得封装调用请求。

As with abstract classes, you can define any number of method signatures.
对于抽象类，可以定义任意数目的方法签名。

Other uses would be better served with public abstract base classes.
对于抽象基类, 可能会更好的服务于其它用处。

This abstract class is the superclass of all classes representing an output stream of bytes.
该抽象类是所有表示字节输出流得类得父类。

For more information, see Abstract and Sealed Classes and Class Members.
有关更多信息，请参见抽象类，密封类和类成员。

The fundamental ideas behind classes are data abstraction and encapsulation.
类背后蕴涵得基本思想是数据抽象和封装。

Depend upon abstractions. Do not depend upon concrete classes.
要依赖抽象, 不要依赖具体类。

Core academic classes will meet for a total of five periods on the six school days.
一周六天上课时间中共有五节核心学术课。

Should sports classes be sacrificed in High School so students Academic subjects
您赞成牺牲中学生的在校运动课程, 以转移至主科得课程吗？

The local gentry and professional classes had held aloof for the school had accepted their sons readily enough.
因为学校非常乐意地接收了他们的孩子，所以当地的贵族和职业阶层都保持着冷漠超然的态度。

Education now offers the lower classes access to job opportunities.
教育如今为下层阶级提供了就业的门道。

Provides the main access point for classes interacting with the security system.
对与安全系统交互的类提供主访问点。

Generic classes may be constrained to access to methods on particular data types.
可以对泛型类进行约束以访问特定数据类型的方法。

ON ACCESSIBLE PROPERTIES OF EQUIVALENCE CLASSES OF EFFECTIVE COMPUTABLE FUNCTIONS
能行可计算性函数渐进优超等价类的可达性质