不要忘了选择正确的HM c取样速率，否则不会看到任何匹配的数据！

Do not forget to select the correct HMC sample rate, otherwise you will not see any matching data!

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其中三分之一的儿童还随身携带一个背包，内置空气取样器和GPS，以便将取样器的显示数据和确切位置相匹配。

A third of the kids also carried a backpack fitted with an air-sampling device and a GPS to pair up readings and precise locations.

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该类型的不匹配产生的主要问题是在运行时会产生失败，但也不会一直失败，这使得取样测试(sniff test)可能会遗漏错误。

The major issue with this type of mismatch is that the failure happens at run time and will not consistently fail, making it possible for a sniff test to miss the problem.

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