The contrary phenomena mean an essential distinction.

两个现象正好相反，是一个本质差别。

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Land information and geographic information are two conceptions that have connection. but an essential distinction each other.

土地信息与地理信息是两个互有联系但又有实质性区别的概念。

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There is, as a matter of fact, an essential distinction between the concept of Petty's general Labour and that of Marx's abstract Labour.

而配第的“一般劳动”同后来马克思的抽象劳动概念又有本质区别。

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