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系統的一個重要組成部分，對維持林分結構和土壤質量起著重要作用。 - 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來探討林冠結構與林下光環境已有約半世紀。
