PHn.[化]酸碱度(=Potential Of Hydrogen)abbr.公共卫生(=Public Health)abbr.紫心勋章(=Purple Heart)Pholtrate福尔可定[镇咳药, 镇痛药]

1. Much dispute has centered on the nature of the plant community.
   许多的争论集中于植物群落的性质。
2. In the plant vegetations are mainly communities, the niche breadths vary greatly and the similarity ratios among different plants are very low.
   植物群落内生态位宽度悬殊，植物种之间的生态位相似比例很小。