While possible in theory, the promise was clearly oversold.

这一前景理论上可行，但实际上吹嘘过度。

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While theory insists that working with only one test suite is possible, this is unmanageable in practice.

虽然理论上可以只使用一个测试套件，但是在实践中这种情况难以管理。

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While this is in theory possible with traditional telephone networks, access to switching equipment is easier to control.

虽然这对传统电话网络在理论上也有可能，但交换设备更容易保护。

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