Now you see how the totaldifferential 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。
2
Add that up over a 40-year working life and the totaldifferential is about 0,000, she figures.
根据她的计算，如果是加上40年的工龄，总的工资级差将会达到80万美元。
3
Add that up over a 40-year working life and the totaldifferential is about 800,000, she figures.