During this period, large North American animal species like mammoths and saber-toothed cats disappeared.

VOA: special.2009.01.20

You're taking advantage of a promoter system, or a gene activation system, that this species knows about because adult animals can make milk.

我们之所以能利用这个启动子系统,或者称之为可以被这一物种识别的,基因活化系统,是因为成年动物可以泌乳

耶鲁公开课 - 生物医学工程探索课程节选

And the idea of this--What that means is that development of an individual mimics or repeats development of the species.

这个短语的意思是,个体的发展,模拟或重演了种族的发展

耶鲁公开课 - 心理学导论课程节选

The result of this would be the formation of new species.

VOA: special.2009.02.25

This is called ionization, gas phase species loses an electron.

而这个过程是离子化，气相组分失去一个电子。

麻省理工公开课 - 固态化学导论课程节选

This is the species of squash that includes pumpkins and gourds.

VOA: special.2009.10.27

Several large animal species had disappeared so people had to find other animals and so this changed from going to find animals to domesticating animals, and shift from collection of plants to production of plants.

很多大型动物物种已经灭绝了,人类不得不去寻找其他动物,因此这也就完成了从狩猎到驯养的转变,从采集到种植的飞跃

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The successful recovery of some well-known species is evidence of this.

VOA: special.2009.05.12

And then there is this third species, the neutron, which has no charge.

这是第三种了，中子，不带电。

麻省理工公开课 - 固态化学导论课程节选

"She's become unstable." "This is the disaster everyone warns about: a new species set loose in the world."

VOA: standard.2010.06.09

He says this has worked in Bolivia, which has a huge population of yacare,a species of crocodile.

VOA: standard.2010.01.31

That's the lesson I try to remind myself of every day; we have an equal vote with all these other species on this planet."

VOA: standard.2010.08.04