321.According to data gathered by Harvard Law School professor Lani Guinier, the motst selective schools are more likely to choose blacks who have at le88t one immigrant parent from Africa or the Caribbean than black titudents who are de:scendanls of American slaves.
据哈佛大学法学院教授拉尼·吉尼尔收集的信息显示，比起那些美国奴隶的后代，筛选最严格的学校更有可能选择那些父母中至少有一方是从非洲或加勒比地区移民而来的黑人学生。

六级词汇讲解:

本句的主干是...the most selective schools are more likely to choose...than...，两个被比较的对象分别是blacks和black students，其后面均由who引导的定语从句修饰。gathered by Harvard Law School professor Lani Guinier是省略了that的定语从句，修饰datao according to意为“根据；按照”，descendant意为“后代；后裔”。