八维空间（eight-dimensionalspace）是物理学界的一个理论，这一理论认为八维空间分为X维（物体的长）、Y维（物体的宽）、Z维（物体的高）、时间维、速度维、温度维、电磁力维、万有引力（或斥力）维。
就像重新打开了通过纳尼亚的衣柜门，成千上万的彩色生物前赴后继的从八维空间归位到我脑中。
Immediately, it is as if the wardrobe doors to Narnia have been thrown open again and thousands of other technicolour lives have tumbled straight back out from that eighth dimension inside my head.
八元树是一种优秀的三维空间表示方法。
It is an excellent way to use octree for representing three-dimensional (3d) space.
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