在人工繁殖过程中消除

Bred \Bred\,
imp. & p. p. of {Breed}.

{Bred out}, degenerated. ``The strain of man's bred out into
baboon and monkey.'' --Shak.

{Bred to arms}. See under {Arms}.

{Well bred}.
(a) Of a good family; having a good pedigree. ``A gentleman
well bred and of good name.'' --Shak. [Obs., except as
applied to domestic animals.]
(b) Well brought up, as shown in having good manners;
cultivated; refined; polite.