例如，如果您有一个帽子的3d模型，您或许希望他一直呆在某个人的头部的模型上方5个单位的位置。
For example, if you have a 3d model of a hat, you might want to specify that it always stays five units above a 3d model of a certain person's head.
多租户：支持不同业务单位或地区办公室的应用可以从单一位置交付成本效益。
Multi-tenancy: applications supporting different business units or regional offices can be delivered cost-effectively from a single location.
第二个行星带距离它的恒星为20个天文单位，这相当于太阳系中天王星的位置。
The second asteroid belt lies at about 20 astronomical units from the star, or a position comparable to Uranus in our solar system.
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