名词
中文翻译：树皮
同义词：
['bark', "sapwood例句：1. The tree's bark is rough and thick.（这棵树的树皮粗糙且厚。）2. The sapwood of the tree is soft and easy to peel off.（这棵树的树皮下层柔软，容易剥落。）3. The bark of the tree is used for making paper.（这棵树的树皮被用来制作纸张。）"]
例句：
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1. The tree's bark is rough and thick.
这棵树的树皮粗糙且厚。
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2. The sapwood of the tree is soft and easy to peel off.
这棵树的树皮下层柔软，容易剥落。
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3. The bark of the tree is used for making paper.
这棵树的树皮被用来制作纸张。