名词
中文翻译：粗糙的树皮
同义词：
['bark', 'sapwood', 'heartwood']
例句：
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1.The roughbark of the tree is a natural insulator.
这棵树的粗糙树皮是一种天然的绝缘材料。
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2.The roughbark of the tree has been used for centuries as a source of medicine.
这棵树的粗糙树皮被用作数百年的药物来源。
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3. The roughbark of the tree is rich in nutrients that are essential for plant growth.
这棵树的粗糙树皮富含对植物生长至关重要的营养物质。