PHn.[化]酸碱度(=Potential Of Hydrogen)abbr.公共卫生(=Public Health)abbr.紫心勋章(=Purple Heart)phonogramn.音标符号；唱片；谐音字

1. The Main Diseases and their Control in Phalaenopsis sp.
   蝴蝶兰主要病害的发生与防治。
2. Commercial production equipment and culture techniques of Phalaenopsis spp.
   蝴蝶兰工厂化设施栽培技术。