在诸因素变动幅度不大的条件下，代之以全微分法是一个理想的选择。
Within the range of all uncertain factors being narrow, it is an ideal way for us to replace it with the total differentiation method.
本文使用全微分法和常数变易法，从不同角度给出伯努利方程通解的公式。
In this paper, using total differentiation method and variation of constants, we give general solution formula of Bernoulli equation with different methods.
本文使用全微分法和常数变易法，从不同角度给出伯努利方程通解的公式。
In this paper, the methods of variation of parameters for salving the Vacco dynamical equations are given.
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