He saw that pigeon-fanciers and stock-breeders deve lop certain types by preserving those variations that have the desired characteristics. 李贝.西洋科学史.
These worthies suffer in the flesh and do penance all their lives, I suppose, but they look like consummate famine-breeders. 马克·吐温.傻子出国记.
Breeders believe that long limbs are almost always accompanied by an elongated head. 查尔斯·达尔文.物种起源.
It is certain that several of our eminent breeders have, even within a single lifetime, modified to a large extent their breeds of cattle and sheep. 查尔斯·达尔文.物种起源.
Breeders of cattle wish the flesh and fat to be well marbled together. 查尔斯·达尔文.物种起源.
Breeders habitually speak of an animal's organisation as something plastic, which they can model almost as they please. 查尔斯·达尔文.物种起源.