例如，这种理论模型允许用更有效的等价操作来代替关系代数操作同时不影响结果。

This theoretical model allows, for example, that relational algebra operations to be replaced by more efficient equivalent operations whereas not interfere with the result.

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在一个传统计算机中，任何时刻一个比特被表示为1或0 .由于量子力学的奇怪结果，等价的情形在一个量子计算机中，一个量子比特能够被表示为任意值的叠加。

In a conventional computer, a bit can represent either 1 or 0 at any time. Thanks to the quirks of quantum mechanics, the equivalent in a quantum computer, a qubit, can represent both values at once.

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清单3实际演示了Zend_Gdata客户端库，即使用它来产生等价于清单2产生的结果。

Listing 3 illustrates the Zend_Gdata client library in action, using it to produce a result equivalent to that of Listing 2.

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And what it turns out is experimental evidence tells us that these two structures are equivalent.

而实验结果也告诉我们,这两种结构是等价的。

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