全微分

These quantities are not perfect differential.

这些量不是全微分。

Empirical Temperature, Work, Exact Differentials.

经验温度，工作温度，全微分。

These quantities are not perfect differential.

这些量不是全微分。

Generally, the error formula of over-wire measurement is derived from an approximate formula.

通常通过对跨线测量各种近似公式全微分得到近似的误差公式。

Now you see how the total differential accounts for, somehow, all the partial derivatives that come as coefficients of the individual variables in these expressions.

现在可以看到，全微分里面的这些偏导数系数，都可以用一个变量表示出来。