And once its population is big enough, workers construct a system of tunnels stretching over 100 meters across terrain, along fallen logs, and up into tree crowns.
一旦它的人口足够多，工人们就会建造一个隧道系统， 隧道系统延伸超过 100 米， 穿过地形，沿着倒下的原木， 一直延伸到树冠。
Tree crown
原声例句
TED-Ed（视频版）
英语百科
Crown (botany)
（重定向自Tree crown）
The crown of a plant refers to the totality of an individual plant's aboveground parts, including stems, leaves, and reproductive structures. A plant community canopy consists of one or more plant crowns growing in a given area.
The crown of a woody plant (tree, shrub, liana) is the branches, leaves, and reproductive structures extending from the trunk or main stems.
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