我们首先要做的事是,求偏导数，fx是多少？
What we would start doing immediately is taking the partial derivatives. What is f sub x?
采用数值微商求偏导数的方法，从而使GPS网平差的计算模型非常简洁。
The numerical partial derivative is introduced to simplify the GPS network adjustment model.
计算偏导数的办法没这么麻烦，因为我们有常规的方法，因此我们不需要通过定义去求偏导数。
And, we'll actually learn how to compute their partial derivatives without having to do this because we'll just have the usual methods for computing derivatives.
所用的可靠度计算公式直接在基本变量空间中求解，避免了繁琐的求偏导数和正交变换工作。
The formula of reliability index is calculated in the origin space directly, so derivation and orthogonal transformation are avoided.
你可以想象一下对它们继续求偏导数，将会得到很多偏导数，所以我们要，仔细考虑那时的情形。
You can imagine that if you keep taking partials you may end up with more and more, so we will have to figure out carefully what the condition should be.
这意味着，当我们对吉布斯自由能求它的变量，的偏导数的时候，我们会得到我们以前学过的东西。
So this means that they were taking the derivatives of the Gibbs free energy with respect to one of its variables is something that we should know.
这意味着，当我们对吉布斯自由能求它的变量，的偏导数的时候，我们会得到我们以前学过的东西。
So this means that they were taking the derivatives of the Gibbs free energy with respect to one of its variables is something that we should know.
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