underside of forest的用法和樣例：
例句
- Undergrowth, one important component of the forest ecosystem, plays an important role in maintaining the forest structure and soil quality.
林下植被作為森林生態(tài)系統的一個(gè)重要組成部分，對維持林分結構和土壤質(zhì)量起著(zhù)重要作用。 - Hemispherical photography has been used to study forest canopy geometry and understory light environments for approximately half a century.
摘要利用半球面影像技術(shù)來(lái)探討林冠結構與林下光環(huán)境已有約半世紀。
