但是任何真实晶体的尺寸都是有限的。

However, any real crystal always has a finite size.

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真实晶体和这种理想的结构有种种出入。

Real crystals exhibit a variety of departures from this idealized structure .

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真实的情形是，FPGA的可编程性使它天生就比同等的硬布线芯片大(就晶体管数量而言)。

The reality of the situation is that the programmability of an FPGA makes it inherently larger (in terms of transistor count) than an equivalent hardwired chip.

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