Ever try to check one meter against another by testing with both at the same time and seeing if their results match up? Ever wonder why they might not?

在同一个时候，用两种血糖仪检测，注意他们的结果是否一致，令人惊奇，结果为何不同。

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Electronic funds might double check themselves against a blacklist before they move from one chip to another.

FORBES: The Futures Of Money