理学 设计模式 释 visitor pattern 访问者模式 描述在一个对象结构中对某个对象元素需要执行的操作一种设计模式，使用该模式可以在不改变被操作元素的类的前提下定义作用于这些元素的新操作。
软件工程 释文 visitor pattern 访问者模式
- Qinghai Guide Guojia Dizhi Gongyuan
- Qinghai Haihu Sports Center
- Qinghai Hohxil Guojiaji Ziran Baohuqu
- Qinghai Hohxil National Nature Reserve
- Qinghai Hu
- Qinghai Huzhu Beishan Guojia Senlin Gongyuan
- Qinghai Kanbula Guojia Senlin Gongyuan
- Qinghai lake grassland
- Qinghai Lake Scenic and Historic Area
- Qinghai Library
- Qinghai Liuwan Painted Pottery Museum
- Qinghai Longbao National Nature Reserve
- Qinghai Menda Guojiaji Ziran Baohuqu
- Qinghai Mountain Vole
- Qinghai Nanshan
- Qinghai Niaodao Guojiaji Ziran Baohuqu
- Qinghai People’s Opera Theatre
- Qinghai Pingxian opera
- Qinghai Plateau yak
- Qinghai Provincial Archives
- Qinghai Provincial Museum
- Qinghai Qaidam Suosuolin Guojiaji Ziran Baohuqu
- Qinghai Qinghai Lake National Nature Reserve
- Qinghai rock arts
- Qinghai Sanjiangyuan Guojiaji Ziran Baohuqu