名词
中文翻译：树皮
同义词：
['bark', "outer bark例句：1. The tree's over bark is peeling off.（这棵树的树皮正在脱落。）2. The old tree had a thick layer of over bark.（那棵老树有厚厚的一层树皮。）"]
例句：
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1. The tree's over bark is peeling off.
这棵树的树皮正在脱落。
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2. The old tree had a thick layer of over bark.
那棵老树有厚厚的一层树皮。
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3. The bark was so thick that it was almost indestructible.
树皮非常厚，几乎无法摧毁。