一只Bibrons壁虎利用本季节第一场雨的优势，从倒下的树干后冒出来。
A Bibrons gecko emerges from behind a fallen tree trunk to take advantage of the first rains of the season.
整枝机在绕树干螺旋上升的过程中利用链锯进行整枝。
In the process of spiraling climbing around the trunk, the pruning machine is pruning by chain saw.
据此，在利用材积密度法估计树干干重时，相同树种不同个体可以采用统一的平均密度值。
Same average density can be used to estimate stem dry weight of the same species of trees.
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