4.Although Gutman admits that forced separation by sale was frequent，he shows that the slaves' preference，revealed most clearly on plantations where sale was infrequent，was very much for stable monogamy.
5.Gutman argues convincingly that the stability of the Black family encouraged the transmission of-and so was crucial in sustaining-the Black heritage of folklore，music，and religious expression from one generation to another，a heritage that slaves were continually fashioning out of their African and American experiences.
6.This preference for exogamy，Gutman suggests， may have derived from West African rules governing marriage，which，though they differed from one tribal group to another，all involved some kind of prohibition against unions with close kin.
古特曼表示，这种对于外部通婚的偏爱很有可能缘起于西部非洲制约着婚姻的规定，尽管这些规定在一个和另一个部落群体之间不尽相同，但都涉及到某种对近亲联姻（union with close kin）的禁止。
7.His thesis works relatively well when applied to discrimination against Blacks in the United States，but his definition of racial prejudice as “racially-based negative prejudgments against a group generally accepted as a race in any given region of ethnic competition，” can be interpreted as also including hostility toward such ethnic groups as the Chinese in California and the Jews in medieval Europe.