1991 - Apartheid: the South African Parliament repeals the Population Registration Act, which had required all racial classification of all South Africans at birth.

1991年，种族隔离。南非国会取消人口注册法案，这项法案要求所有南非人在出生时要进行种族分级。

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First, the Court required especially strict scrutiny of legislation that employed a "suspect classification", meaning discrimination against a group on grounds that could be construed as racial.

首先，最高法院要求对采用“可疑分类”的立法进行特别严格的审查。“可疑分类”指的是以种族歧视为理由对一个群体的歧视。

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This paper illustrated the characters about root canal morphology of mandibular premolars, including the formation, configurations, racial difference, classification and methods for study.

本文简要介绍下颌前磨牙多种解剖结构的形成、形态特点、人种差异、分型和研究方法。

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