... 树蕨 tree fern 树高比tree height ratio 乔木层 tree layer ...
双语例句
1
The ratio of damaged trees was negatively correlated with stand density, soil depth and size class of diameter, and positively correlated with treeheight.
林分密度和受灾率及土层厚度和受害株数均呈显著的线性负相关;
2
The larval tunnel quantitative ratio increase with the pine treeheight and DBH increased, but it was no correlated with the volume of different height region in tree.