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。
A North American deciduous tree (Ulmus Americana) having double serrate leaves and winged fruits. It is grown chiefly as an ornamental shade tree but often dies from Dutch elm disease.
一种北美落叶树(美洲榆)，有双齿叶和双翼果，主要作为观赏性浓荫树，但常患荷兰榆树病而坏死。
Any of various deciduous trees of the genus Ulmus, characteristically having arching or curving branches and serrate leaves with asymmetrical bases. Elms are widely planted as shade trees.
榆树任一种榆属的落叶树木，有拱形或曲线形树枝和锯齿形不对称的树叶。
The best regression models (e. g. Ulmus pumila) of leaf content against air SO2 and leaf stomatic resistance could explain that the sulfur acted as pollutant entered plant mainly through stoma.
植物叶片硫含量与大气SO2和气孔阻力的回归模型说明，以污染状态进入植物体的硫，主要通过气孔进入；
The best regression models (e. g. Ulmus pumila) of leaf content against air SO2 and leaf stomatic resistance could explain that the sulfur acted as pollutant entered plant mainly through stoma.
植物叶片硫含量与大气SO2和气孔阻力的回归模型说明，以污染状态进入植物体的硫，主要通过气孔进入；
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