overstory的读音 overstory中文意思

英音  ['əʊvə'stɔ:rɪ] 
美音  ['oʊvəˌstoʊri:] 
n. 上层林冠,上层林;顶层
overstory 用法和例句
These tropical trees of life provide housing and recreational facilities while mimicking the five layers found within a tropical rainforest : the overstory , the canopy , the understory , the shrub layer , and the forest floor .
这些拥有生命的“热带雨林”按照一个真正热带雨林系统中的五层生物圈:树冠上层,树冠层,树冠下层,灌木层,地表层布置提供居住和娱乐设施。