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
- Petroleum Science And Technology
- Petroleum Science Bulletin
- petroleum solvent
- petroleum spray oil
- Petroleum Storage & Transportation Committee of China Petroleum Society
- petroleum sulfonate
- petroleum survey degree
- petroleum survey techniques
- petroleum system
- petroleum tar
- petroleum wax
- petroleum wax production
- petroliferous basins
- petrolift
- petrologial constitute
- petrologic types
- petrology
- Petropavlovskiy crater
- Petropavlovsk-Kamchatskiy
- petrophysical facies
- petrophysical properties of rock
- petro physics
- petrophysics
- Petrosani
- petrosavia family