The koala is a nocturnal, tree dwelling marsupial mammal.

考拉属喜夜间活动的、于树上的有袋类哺乳动物。

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It is the size and immense adaptability of the human brain that is responsible for the transformation of our species from tree-dwelling primates into the dominant species on the planet.

正是由于人类大脑的体积和广泛的适应性，我们才得以从居住在树上的灵长动物演化成这个行星上的支配性物种。

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Spruce Tree House is the easiest cliff dwelling to visit. The path curves down into the valley and then up to the ruin.

云杉屋是最容易参观的崖居，通往云杉屋的道路蜿蜒曲折而下到峡谷，然后向上到达这个崖居。

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Such fast change is not seen among apes, and while Prof Tattersall acknowledges the importance of the move our ancestors made from a tree-dwelling, to a ground-dwelling existence - something which has not affected our primate cousins - he says it is not enough to explain what is observed.

BBC: Conflict and 'boom-bust' explain humans' rapid evolution