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。
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.
现在没人知道激发一种既存的人体病菌有多么容易，不知道使病菌传染给另一种动物，帮助其跨越物种界限而传播有多么容易。
No one now knows how easy it would be to turbo-charge an existing human pathogen, or take one that infects another type of animal and assist its passage over the species barrier.
不过土拨鼠们并没有那样的界限，他说，“因此有人猜测在物种之间可能存在着系统化的现象，这太有意思了。”
Marmots didn't have that limitation though, he says, "so the idea that there may be something systematic here between species is extremely interesting."
我相信物种终究是界限分明的实物。
I believe that species come to be tolerably well-defined objects.
我认为爱是超越任何界限的。我认为爱是没有性别，没有种族，没有身份地位的区别，更甚至没有物种的分别。
I think love is beyond any boundary and for love regardless of gender, race, difference of status, even species.
目的：阐明中国药用甘草物种之间的界限，为甘草资源开发和优良品种选育奠定基础。
Objective: Elucidate the medicinal licorice species circumscription in order to develop licorice resources in China and select new cultivars.
目的：阐明中国药用甘草物种之间的界限，为甘草资源开发和优良品种选育奠定基础。
Objective: Elucidate the medicinal licorice species circumscription in order to develop licorice resources in China and select new cultivars.
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