Knowledge of related vegetation in other areas is usually not considered when defining the vegetation units . 在确定植被单位时一般不考虑其他地区有关的植被资料。
2.
The importance of units of the plant cover broader than the phytocoenose for classification is acknowledged by soviet geobotanists . 苏联地球植物学家认识到，比植物群落较广泛的植被单位对于分类的重要性。
