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1.All abstract classes must be base classes.
所有的抽象类都应当是基类。收藏指正
2.Base class sub-objects may have zero size.
基类子对象可以具有零大小。收藏指正
3.Abstract base classes are quite elegant to encapsulate calling conventions.
抽象基类很优雅的封装调用请求。收藏指正
4.The subclass always includes the superclass and defines a pointer to the class description and to the metaclass description if there is a new one.
子类总是包含了基类，还定义指向类描述的指针以及指向元类描述——如果有新的的话——的指针。收藏指正
5.Whenever you have found a multiple inheritance relationship in an object-oriented design, be sure that no base class is actually a derived class of another base class.
如果你在一个面向对象设计中发现了多重继承关系，确保没有哪个基类实际上是另一个基类的派生类。收藏指正
6.In generally ,we can say that anytime u redefine an overloading function name from the base class,all of the other versions are automatically hidden in the new class.
总结为：继承类把基类的重载函数重定义后，只能调用继承类对象的已重定义的函数，而不是调用基类的那些重载函数（同名函数），即在继承类中基类的重载函数被隐藏！收藏指正
7.An abstract base class imposes unnecessary restrictions on application-oriented development of the class hierarchy.
抽象基类给面向应用的开发的类结构强加了不必要的约束。收藏指正
8.This is all there is to simple inheritance: a subclass is derived from a superclass (or base class) merely by lengthening the structure that represents an object of the superclass.
这就是一个简单继承的全部：子类由父类（或基类）继承而来，方法就是丰富表示父类的数据结构。收藏指正
9.To be on the safe side, we supply superclass selectors for all dynamically linked methods, i.e., every selector has a corresponding superclass selector.
保险起见，我们给所有动态连接方法提供基类选择器，即每个选择器都有其相应的基类选择器。收藏指正
10.Synthesis of new types of chiral α-acetylamino-β-aryl acrylic acid compounds
几种手性α-乙酰氨基-β-芳基丙烯酸类化合物的合成收藏指正
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