名词
中文翻译：软木皮层
同义词：
['phloem', "xylem例句：1. The tree's phellogen is the primary source of its energy.（这棵树的软木皮层是它的主要能量来源。）2. The phellogen layer is responsible for transporting water and nutrients throughout the plant.（软木皮层负责将水分和养分在整个植物中运输。）"]
例句：
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1. The tree's phellogen is the primary source of its energy.
这棵树的软木皮层是它的主要能量来源。
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2. The phellogen layer is responsible for transporting water and nutrients throughout the plant.
软木皮层负责将水分和养分在整个植物中运输。
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3.The phellogen layer is crucial for photosynthesis in plants.
软木皮层对于植物的光合作用至关重要。