测量范围

measurement category的用法和样例：

例句

Because the Faraday rotation angle increases periodically with the current measured,only a monotone region of the sinusoid could be used and the measurement range is narrowed.由于法拉第旋转角随被测电流周期性增大，测量时只能利用正弦曲线单调变化的部分，因此限制了电流的测量范围。

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