defoliate
词根词缀：
defoliate v. 使落叶
de 去掉 + foli 树叶 + ate 使… → 使落叶
foliage n. 树叶
foli 树叶 + age 表总称 → 树叶
latifoliate adj. 阔叶的
lati 阔 + foli 树叶 + ate 具有…的，有…性质的 → 阔叶的
portfolio n. 文件夹；投资组合
port 拿 + foli 树叶 + o 抽象名词 → 拿树叶〔书页〕的东西 → 文件夹
数据来源：新东方英语词汇速记大全
相关例句：
Results showed that: hay, defoliate leaves and branch of current year were the main food components of gorals. Total of 22 plant species belonging to 20 genus were foraged during winter.
结果表明，斑羚冬季主要以枯草、落叶和当年生枝条为食，共取食20属，22种植物。
A herbicide used in the Vietnam War to defoliate forest areas.
越战中使用的导致森林地区树木落叶的除草剂。
So were there 7 ones in leave color to defoliate degree.
叶色与落叶度有7个达极显著正相关程度；
Infestations of these caterpillars may defoliate oaks and other hardwood trees but usually do no permanent damage.
这些毛虫的侵扰可能使橡树落叶和其他树木的硬木树但通常都没有永久性损伤。
The Advance of Studying on Chilling Requirement of Defoliate Fruits Forsythia Suspensa Vahl. belongs to Oleaceae's defoliate shrub.
落叶果树需冷量的研究进展连翘是木犀科连翘属植物，落叶灌木，传统以果实入药。
In total, the vegetation types were evergreen broad-leaf forest, evergreen defoliate broadleaf mixed forest, coniferous forest and dwarf forest at mountain ridge according to altitude from low to high.
从整体上看，海拔从低往高的森林植被类型分别为常绿阔叶林、常绿落叶阔叶混交林、针叶林和山顶矮灌。