It is richly ironic that were the scandal to lead news corp to sell its uk papers , and some of them were to prove inviable in new ownership , such plurality could be another casualty of this affair .

极具讽刺意味的是，假如丑闻导致新闻集团卖掉旗下英国各报纸，而其中一些在新东家手中无法继续生存，那么媒体多样性可能会成为丑闻的又一个受害者。

One of the main obstacles is that , even if members of different species might mate , when the two species are too distant genetically or carry different numbers of chromosomes , the offspring are usually inviable or infertile ( like zorses and mules ) , and are therefore evolutionary dead ends .

其中最主要的障碍在于，即便不同物种之间的某些成员交配成功，但由于物种间的遗传差异过大或携带了不同数目的染色体，其产生的后代通常无法存活或无法生育（如斑马马和骡子），进化走入了死胡同。

Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids .

完全在同一种群内进行杂交的个体比以两个方向进行杂交的个体繁殖后代要多，因此为了产生无生机的杂种，就要消耗掉一些配子。