When one animal attacks another, it engages in the most obvious example of aggressive behavior.

当一只动物攻击另一只动物时，它会做出最明显的攻击行为。

youdao

He explains that the disappearance of one animal can have serious consequence to remaining species in that habitat.

他解释说，一种动物的消失可能会对该栖息地的其他物种造成严重的后果。

youdao

Tired of waiting in the back of the line to get on Noah's Ark, a flea jumps from one animal to another as she moves closer to the front.

厌倦了在队伍后面等着登上诺亚方舟，一只跳蚤从一只动物跳到另一只动物，渐渐靠近前面。

youdao

But there is one animal on Earth today that may help scientists learn about dinosaurs.

VOA: special.2010.06.04

He is the author and editor of over 30 books including one seminal book, well, many seminal books, but one in particular that I'll mention, Animal Liberation.

他曾撰写编辑书籍30余本,其中一本影响深远，当然，其中的很多都很有影响力,但是我要特别提到这一本，《动物解放》

普林斯顿公开课 - 人性课程节选

Levi-Strauss writes: Whatever may have been the moment and the circumstances of its appearance in the scale of animal life, language could only have been born in one fell swoop.

列维，施特劳斯写道：,不论语言是何时何种环境下,在动物的历史中诞生的，语言只可能是一刹那间诞生。

耶鲁公开课 - 文学理论导论课程节选

One animal whose sex life has come in for close scrutiny is the wombat.

ECONOMIST: Endangered species

If they're right, this means the cancer is literally jumping from one animal to the other, much like a parasite.

NPR: Startling New Evidence Cancer Is Contagious

And crucially, like polio, smallpox had only one animal host: Homo sapiens.

ECONOMIST: Can a businessmen��s club eradicate polio from the world?