The government uses a classification system that includes both race and ethnicity.

政府采用一种既包括人种又包括种族的类别体系。

《柯林斯英汉双解大词典》

An ontology is a classification system.

本体是一个分类系统。

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The industry is still attempting to come up with a classification system that everyone agrees with.

业界还没能找出一个所有人都同意的分类体系。

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"There's a classification system for censorship, and even his lawyer is not allowed to speak about these things unless it's been declassified, " she said.

BBC: Prisoner at Guantanamo Bay

Burgundians believe a wine's character is derived principally from the plot of land the vine is planted on, which is graded by a classification system based on the vineyard, village and subdistrict.

WSJ: Will Lyons on Wine: The Joyful Restraint of 2011 Burgundy

Cannon was known as the "census taker in the sky, " and developed a stellar classification system that became the standard of the Harvard Observatory.

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