The koala is a sluggish, tailless, furry arboreal marsupial.

考拉是一种行动迟缓的、无尾的、有皮毛、生活于树上的有袋目哺乳动物。

This young orangutan will grow to be the heaviest arboreal animal in the world.

这只年幼的红毛猩猩长大后将成为地球上最重的树栖动物。

Whether the first birds evolved from arboreal or terrestrial ancestors is a matter of lively debate among palaeontologists.

于第一只鸟是从树栖还是陆生的祖先进化而来，一直是古生物家激烈争论的话题。

Given that humanity's arboreal simian ancestors would presumably have had little need to run, it is probably the latter.

鉴于人类的祖先—类人猿是树栖动物，据推测它们很少有奔跑的需要，此正确结论很可能是后者。

Rather, it is an arboreal artifice, the world's first commercial-scale direct air capture, or DAC, plant.

相反，它是一种树栖术，是世界上第一个商业规模的直接空气捕获或 DAC 植物。

And so you're looking at something that was probably completely arboreal.

所以你看到的东西可能完全是树栖的。

Once hunted for its fur, this arboreal leaf-eater is today protected by stringent laws and is making a slow but steady comeback.

这种以树为家的吃叶族曾经其毛皮而遭猎捕，受到严格法令的保护，其数量成长正慢慢地回稳。

This is called the arboreal leaping theory, which sounds kinda fun.

这就是所谓的树栖跳跃理论，听起来还挺有趣的。

Because orangutans are arboreal; they spend most of their time high in the trees.

为猩猩是树栖动物；他们大部分时间都在树上度过。

At these levels, additional downpours of acid rain would destroy the region's marine and arboreal ecosystems in a matter of decades.

在这些水平上，额外的倾盆大雨将在几十年内破坏该地区的海洋和树木生态系统。

Only when these hominids had to travel between arboreal habitats would they find themselves walking bipedally, 'forced' to do so by their own anatomies.

“只有当这些人动物在两棵树上的栖息地之间来回穿梭时，他们才不得不用两足来行走。由于他们骨骼的结构特点，他们是‘被迫’这么做的。”

So the modern birds' ancestors have the chance to explore arboreal habitats or predatory habitats or aquatic habitats kind of for the first time.

此，现代鸟类的祖先第一次有机会探索树栖栖息地、捕食栖息地或水栖栖息地。

They were probably arboreal hunters that chased prey through the treetops.

他们可能是树栖猎人，在树顶追逐猎物。

NARRATOR: In the arboreal scenario, the bird ancestor was a small climbing animal that evolved flight by gliding from the treetops.

旁白：在树栖场景中，鸟类祖先是一种小型攀爬动物，通过从树顶滑翔进化出飞行能力。

But it is only the human eye which prefers the arboreal rodents in a particular place to be red rather than grey.

但希望在某个特定地点，树上住着红色啮齿动物，而不应该是灰色啮齿动物的，实际上只有人类。

They spend a great deal of their time in trees, and are considered to be the most  arboreal bear species in the world.

它们大部分时间都在树上度过，被认为是世界上最喜欢树栖的熊种。

But an arboreal origin of flight where you fall out of a tree, you accumulate air speed whether you want to or not.

但在飞行的树栖起源中，你从树上掉下来，无论你愿意与否，你都会积累空气速度。

These are that the bat ancestor was arboreal, or lived in trees; it was insectivorous, or ate insects; and it was probably nocturnal.

这些是蝙蝠的祖先是树栖的， 或者住在树上；它是食虫的， 或者吃昆虫；它可能是夜间活动的。

And, being arboreal, its digits would've been selected to get longer, with a membrane stretched between them, to more effectively capture food.

而且，由于是树栖动物， 它的手指会被选择得更长一些，它们之间有一层薄膜，以便更有效地捕捉食物。

This arboreal creature would've developed longer digits and a membrane between them as part of its gliding phase, eventually transitioning into powered flight.

作为滑翔阶段的一部分， 这种树栖生物会长出更长的指趾和它们之间的膜，最终过渡到动力飞行。