1·Although natural hosts are birds, the avian influenza viruses are known to cross species barriers to infect other mammals, including humans.
尽管鸟类是自然宿主，但禽流感病毒能够跨物种感染其它哺乳动物包括人类。
2·However, the "flu" virus usually develops different variants that are specialized for each species of animal that they infect. Cross species infections are rare.
但是，流感病毒通常是针对不同种类的动物滋生出不同的变种病毒，跨物种传染的情况很少。
3·If we are to truly understand how much our cognitive lives differ cross-culturally, we must continually explore the depths of our species' linguistic diversity.
如果我们要真正了解在不同文化中我们的认知生活有多大的差异，我们就必须不断探索我们物种语言多样性的深度。
4·Avian flu is not only particularly virulent; italso has the rare capacity to cross barriers between species. But it is hard totransmit.
这种传染病不但致命，而且少有地能跨物种传播，但其传染性有限，禽肉只要充分加热，便不具危险。
5·Some of these AI viruses have also been reported to cross the species barrier and cause disease or subclinical infections in humans and other mammals.
也有报告称，某些禽流感病毒跨越物种界限传播，并导致人类和其他哺乳动物患病或亚临床感染。
6·Vinifera has been honed into hundreds of varieties, red and white; but the grapes are all still members of the same species, with limited cross-breeding between different varieties.
欧亚葡萄已经被培养出几百个变种，或红或白；但是这些葡萄跟其他品种的葡萄杂交的几率非常的小，所以它们仍然属于同一种类。
7·Cross-pollination isn't ensured when an ant picks up pollen off a pancake plant: The ant may then crawl to the ground or another species.
蚂蚁从花朵中收获花粉时并不能保证一定可以产生异花授粉的效果：蚂蚁会爬到地面或其他植株上。
8·And not only human genomes. Cross-species comparisons are enormously valuable.
除了人类的基因组，交叉物种的对比同样有巨大的价值。
9·Virologists brought in to hunt down the Sars virus always suspected that it had lingered in farmyard or domestic animals before making the cross-species jump into humans.
找寻非典病毒的病毒学家们早就怀疑，该病毒在传染给人类之前就已在农场和家畜中存在了。
10·These results showed that there existed the cross antigens in serum and body surface slime among various fish species, which corresponded with their relationship to each other.
所有这些表明，不同鱼种的血清和体表粘液蛋白分子存在与亲缘程度相应的交叉抗原。