名词
中文翻译：根厚度
同义词：
['root length', 'root diameter']
例句：
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1.The roots of the tree are thick and sturdy.
这棵树的根又厚又结实。
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2.The carpenter used a chisel to remove the thick layer of wood.
木匠用凿子把厚厚的一层木头去掉了。
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3.The roots of the plant were so deep that they could not be seen from the surface.
这种植物的根太深了，从表面看看不见。