名词
中文翻译：永久的木心
同义词：
['permanent core', "permanent heartwood例句：1. The tree's permanence is a testament to its resilience.（这棵树的持久性证明了它的坚韧。）"]
例句：
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1. The tree's permanence is a testament to its resilience.
这棵树的持久性证明了它的坚韧。
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2. The permanence of the ecosystem is crucial for its sustainability.
生态系统的持久性对于其可持续性至关重要。
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3. The permanence of the species was a concern for conservationists.
物种的持久性是保护主义者的担忧。