理学 设计模式 释 singleton pattern 单件模式 一种保证一个类只有一个实例，并提供一个全局性的访问点的设计模式。。又称单态模式、单例模式。
软件工程 释文 singleton pattern 单件模式
- crop-climatical potential productivity
- crop coefficient
- crop combination
- crop composition
- crop composition and distribution
- crop cultivar approval
- crop cultivar registration
- crop cultivation for stress-resistance
- crop damage in sunlight greenhouse due to continuous overcast days
- crop disease
- crop disease and pest disasters in China
- crop diseases and insect pests
- crop diseases in China
- crop distribution
- crop domestication
- crop domestication and evolution
- crop ecological adaptability
- crop evapotranspiration experiment
- crop farming
- crop gene discovery
- crop germplasm resources ex situ conservation
- crop germplasm resourceson-farm conservation
- crop germplasm sensitivity to environmental factors
- crop growth condition monitoring by remote sensing
- crop growth model