Betula alko-sinensis var,septentrionalis,Betula pubescens,pubescent birch是什么意思

网络释义

1)Betula alko-sinensis var,septentrionalis,Betula pubescens,pubescent birch,毛桦2)Betula pubescens,柔毛桦

Introduction techniques of Picea abies and Betula pubescens;

挪威云杉和柔毛桦引进技术的探讨