It would be nice to put people on the ground and have them do a species-by-species tracking.

人们躺在地上，和大自然来个亲密接触，这将会多美妙啊。

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Biologists can infer how species are related evolutionarily by comparing DNA sequences for the same genes in different species.

生物学家可以通过比较不同物种中相同基因的 DNA 序列来推断物种之间的进化关系。

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Prey species, like young deer or goats, for example, typically play by performing sudden flight movements and turns, whereas predator species, such as cats, practice stalking, pouncing, and biting.

比如说，像小鹿或者山羊这种被捕食的种群，它们的代表动作就是突然快速逃跑的动作和突然转弯；相反的，猫科动物之类的捕食种群会练习潜行追踪、猛扑和撕咬等动作。

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Vertebrate species,for example, decreased by nearly one-third between nineteen seventy and two thousand six.

VOA: special.2010.05.25

Ray Oelking is selling soup made with crawfish - a freshwater species that is unaffected by the spill so far.

VOA: standard.2010.06.01

Using data collected from soil samples, the research team ran an extreme scenario - where kudzu covered all non-urban and non-agricultural soils in the species' range by 2050 - through a "chemical transport" model.

BBC: Invasive plant 'increases ozone pollution'

Asian short-clawed otters - the world's smallest otter species - are classed by conservation organisations as vulnerable to extinction.

BBC: Otters at Chester Zoo named after Olympic hopefuls

No one knows the number of parasite species, but they appear to outnumber the nonparasite species by 4-to-1.

FORBES: Those Resourceful Bugs