我们迫使测试电流流过测试引线和被测电阻（R）。
The test current is forced through the test leads and the resistance (R) being measured.
然后仪表通过同一套测试引线来测量电阻两端的电压，并计算出相应的电阻数值。
The meter then measures the voltage across the resistance through the same set of test leads and computes the resistance value accordingly.
与数字多用表不同，微欧姆计没有内部电阻器(RS)，所以四条引线都要连接才能进行测量。
It doesn't have the internal resistors (rs), as in the DMM, so all four leads must be connected to make a measurement.
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