名词
中文翻译：基石标记
同义词：
['cardinal feature', 'cardinal point']
例句：
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1.The new policy is the cardinal mark of our company's commitment to environmental sustainability.
新政策是我们公司对环境保护承诺的基石。
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2. The discovery of this artifact is a cardinal mark in the history of archaeology.
这一发现是考古学史上的一个里程碑。
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3. The cardinal mark of their success was their ability to adapt to change.
他们成功的关键因素是能够适应变化。