Sometimes, composite keys are called natural keys or business keys.

有时，组合键也称为自然键或业务键。

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Many in Vietnam worry that China is being handed the keys not just to their country's natural resources but also to sensitive strategic areas, threatening the nation's security.

越南很多人担心中国不仅手握他们国家自然资源的钥匙，而且掌握敏感的战略领域，威胁着国家的安全。

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The natsort() function sorts an array by using a "natural order" algorithm. The values keep their original keys.

函数的作用是用“自然排序”算法对数组排序。数组内所有值的键保持不变。

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Though the formula cannot be boiled down to just a few elements, one of the keys to being able to offer that type of intuitive experience is to make something that is natural and consistent, avoiding surprises.

FORBES: The Key To Great Web Software Is A Consistent, Intuitive User Experience