But the study isolated race as a factor by controlling for variables like academic performance, legacy status, social class, type of high school (public or private) and participation in athletics.
但那项研究通过控制学业成绩、遗产地位、社会阶层、高中类型(公立或私立)、参与体育运动等变量，将种族作为一个孤立的因素。
Firstly, it delimits the object of the study, distinguishes between numeral adjective interrogatory pronoun and numeral phrase and concludes that numeral is a type of closed word class.
首先，在理论上明确了研究对象，对数词与助词、形容词、疑问代词、数词词组作了区别，得出了数词是一个封闭的词类的结论。
It mainly includes Chinese research study in classroom instruction and topic type Chinese research study after class.
它主要包括课堂教学中语文研究性学习和课外课题式语文研究性学习。
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