它定义了动态字符串、通用类型、字符集合、列表和其它基本数据类型以及可遗址的线程和同步对象，ip套接字以及命名管道。
It defines dynamic strings, variants, character sets, lists and other basic data types along with portable thread and synchronization objects, IP sockets and named pipes.
随着对象的添加，集合的大小动态增加。
The collection dynamically increases in size as objects are added.
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