Here's how it works. On every U.S. dollar bill in circulation is a 10- or 11-digit serial code that is unique to that bill.

看看它的工作原理：在市面上流通的每张美元钞票上，都有一个10位或11位的唯一的序列码。

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For the most part, on tubes commonly found in circulation today, the code is located on the side of the glass in dark grey paint, down low just above the bottom.

在大多数情况下，对管常见流通的今天，代码位于深灰色油漆在玻璃边，下底低的正上方。

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They are the natural circulation flow analysis code (MC-FLOW), the core thermal hydraulic analysis code (MC-THAS) and the pulsed reactor transient analysis code (MC-TRAN).

它包括脉冲堆自然循环分析程序（MC-FLOW）、堆芯热工水力分析程序（MC-THAS）和脉冲堆瞬态分析程序（MC-TRAN）。

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