英语语法分析

The grafting and cutting propagation tests of Ulmus pumila cv.

对中华金叶榆进行嫁接和扦插繁殖试验。

Ulmus pumila open forest ecosystem plays an important role in Otindag Sandy Land.

榆树疏林生态系统是浑善达克沙地的重要组分之一。

Slippery Elm (Ulmus rubra) bark was used both internally and externally by native Americans and early pioneer settlers.

榆(榆树杨梅)用树皮内部和外部的土生土长的美国人和早期定居者的先驱。