tree stand

My friend, even for a tree, stand below it and look around.

我的朋友, 甚而一棵在它之下的树 、 立场和神色的.

This will be your tree stand.

这就是“圣诞树”的支座.

The vine was going to throw its life away because it could not stand erect and have as fine fruit as the peach tree.

葡萄藤则为自己无法直立，并且无法像桃树那样结出上好的果实而想结束生命

Do not stand under a tree during a thunderstorm.

在雷雨期间不要站在树下.

Effect of Target Tree Stand Management on Natural Regeneration of Pinus tabulaeformis Plantations on Loess Plateau Area

目标树林分作业对黄土高原油松人工林天然更新的影响

The density of the stand for producing middle pole trees should be 3 460 tree per hectare, the spacing should be 1.7m × 1.7m. ( 2) high planting density and severe thinning regime is favorable to all kind of timber production;

中径材1.7m×1.7m，3460株/hm2。（2）采用较高的初植密度，并采用强度较大的间伐机制，对小径材和大、中径材的生产都是有利的；

The 5-year study indicates that the optimal thinning treatment for 20~ 30-year-old natural birch stands is to maintain a stand density of 1 100 stems · hm-2 and the pruning intensity should not exceed 1/ 2 tree height.

5a的研究结果表明，林龄20～30a的白桦天然林最适林分密度为1100株·hm-2，修枝强度不应超过1/2树高。

At different thinning intensity, the tree number (%) and volume (%) of big diameter woods increased with stand age; the growth rate increased with site index and thinning intensity.

不同间伐水平中、大径材的株数（%）和材积（%），随着林龄的增加而递增；立地指数级越高，间伐强度越大，递增的速度越快。

Under the different tree environment, the aero-anion horizontal difference is remarkable; ( 3) In the city ecology environment, the concentration of air anions and CI had no significant differences when the stand structure of arbores were different;

在城市环境下，不同林分结构类型的乔木片林对空气负离子水平以及空气质量指数（CI）的影响差异不显著；（4）天气条件对绿地的空气负离子水平存在显著影响；

Reconstruction of Key Tree Factors in Shade Stand based on Stereo Vision

基于立体视觉的郁闭林分主要测树因子的重建