Nor does it explain why, in a species where one parent determines handedness, a brood is not exclusively right-or left-handed when the offspring would have the same genetic predisposition.(这也不能解释为什么在一个由父母一方决定用利手的物种中，当后代具有相同的遗传倾向时，他们并非完全是右撇子或左撇子。)
Among other benefits, this allows her to freeze the development of an embryo during times of drought and food shortage until the offspring in the pouch is able to leave.(在其他好处中，这使她能够在干旱和食物短缺时期冻结胚胎的发育，直到育儿袋中的后代有能力自己离开。)
One theory is that bipedality evolved in conjunction with the nuclear family: monogamous parents cooperating to care for their offspring.(有一种理论认为，两足动物的进化与核心家庭有关：一夫一妻制的父母合作照顾他们的后代。)
To see whether the plan was working, scientists tracked every panther, as well as its offspring.(为了弄清这个计划是否奏效，科学家们追踪了每只黑豹及其后代。)
The offspring contain a mixture of the genetic blueprint of each parent.(后代体内含有父母亲基因图谱的混合。)
This allows her to freeze the development of an embryo during times of drought and food shortage until the offspring in the pouch is able to leave.(这使她能够在干旱和食物短缺时暂缓胚胎的发育，直到育儿袋里的后代能够独立生活。)
The virus was less deadly to the offspring of surviving rabbits, however, and it caused less and less harm over the years.(然而，这种病毒对幸存的兔子后代致命性更低，多年来造成的伤害也越来越小。)
Is that possible for the offspring to make it on their own so young?(有没有可能是它们的后代这么小就自己谋生呢？)
Many species are similar enough that hybrid offspring are possible and may often occur in nature, but for the majority of species, this rule generally holds.(许多物种非常相似，因此有可能杂交繁衍出后代，而且这种情况可能经常在自然界中发生；但对于大多数物种来说，这一规则大体适用。)
The answer might involve their offspring, which in their larval form drift in the currents to colonize new vents.(答案可能与它们以幼虫形式随着洋流漂流到新的喷气口的后代有关。)
