translation.en: All living white tigers in North America are the result of selective inbreeding -- that would be mother to son, father to daughter, sister to brother -- to allow for the genetic conditions that create a salable white tiger.
translation.zh: 所有生活在北美的白虎 都是通过选择性近亲交配所繁殖的。 这意味着母亲和儿子， 父亲和女儿，姐妹和兄弟交配—— 保证基因的条件 能交配出能出售的白虎。