群系
Formations are often divided into subordinate community types characterized by their dominant species. 群系可以按其優(yōu)勢(shì)物種的特征劃分為一些次級(jí)的群落類型。
n.轉(zhuǎn)換；變化
名詞transformation的復(fù)數(shù)形式.
變形
