名词
中文翻译：灭绝极限
同义词：
['extinction point', 'extinction boundary']
例句：
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1.The species' survival is limited by its extinction limit.
物种的生存受到其灭绝极限的限制。
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2. The researchers found that the extinction limit for this species has been reached.
研究人员发现，这个物种的灭绝极限已经达到。
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3. The extinction limit of this species is still unknown.
这个物种的灭绝极限仍然未知。