控制变量法（英语：control variates）是在蒙特卡洛方法中用于减少方差的一种技术方法。该方法通过对已知量的了解来减少对未知量估计的误差。
控制变量法是探究的一种重要方法，在物中有广泛的应用。
The controlling of variable is an important scientific inquiry method in physics. There is a wide range of applications.
本文就控制变量法在初中物理电学中的应用及注意事项做一探讨。
In this paper, the control variables in the junior high school physics and electrical applications and some notes are discussed.
对控制变量法进行了阐述，并指出了如何运用该方法解决地理教学中的难点问题。
Variable-controlling approach is expounded and how to apply this approach in solving difficulties in geography teaching is indicated.
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