模型也可以作为实现物理系统的先驱被开发,或者模型可以根据一个已存在的系统或者开发中的系统被产生作为理解系统行为的帮助手段。
The models may be developed as a precursor to implementing the physical system, or they may be derived from an existing system or a system in development as an aid to understanding its behavior.
当创建一个体验时,你可能会选择让玩家体验一下作为一个鬼魂(没有物理的存在)的感觉,或在与他或她自己的身体非常不同的身体中。
When creating an experience, you might choose to have the player experience it as a ghost (no physical presence) or in a body that is very different from his or her own.
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