Many persistence mechanisms store data in a relational way rather than an object-oriented way.

许多持久性机制以关系的方法而不是面向对象方法存储数据。

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(If you leave out the second parameter for the decode method, it returns an array rather than an object).

如果忽略decode方法的第二个参数，则返回一个数组而不是一个对象。

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In some cases, you may find that it's more useful to access properties and methods via a class rather than an object instance.

有时候，可能发现通过类而不是对象实例来访问属性和方法更有用。

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Some experts have commented that Angel Ambush was not 'real' augmented reality at all, because the virtual angel was just a layer of video manipulated by a human operator, rather than an independent 3D object.

BBC: Augmented reality goes beyond gimmicks for business