He had mastered both integral and differential calculus by the age of 15.

他在15岁时就已掌握微积分。

What’d be almost as much of a lie as saying I took advanced differential calculus would be saying that Heathrow is quiet and calm.

说我学过高等微分学谎言，那就说希思罗机安静而平静。

Airport, which flies about as many passengers yearly as Heathrow, has seven and if my advanced differential calculus class taught me anything it’s that seven is more than two.

每年与希思罗机一样多的乘客的机有七人，如果我的高等微积分课教会我任何东西， 那就七人多于二人。

This marginalist revolution facilitated the increased use of mathematics in economics to express cost variations, for example, in curves and to analyze rates of change of costs with differential calculus.

这边际主义革命促济学中更多地使用数学来表达成本变化，例如用曲线来表达成本变化，并用微分法来分析成本变化率。

He improved chemistry by improving its language, just as Newton, a century before, had improved physics by systematizing and ordering its language-in the process, as you may recall, developing the differential and integral calculus.

他通过改化学语言来改化学，就像一个世纪前的牛顿通过系统化和整理其语言来改物理学一样——您可能还记得，在这个过程中，发展微积分和积分。

What Jevons also saw, however, was how the concept of incremental utility was readily expressed in graphs and differential calculus, making the argument more visibly apparent and more logically rigorous than in Menger's purely verbal presentation.

然而，杰文斯还看到，增量效用的概念如何很容易地用图表和微分学来表达，使得论证比门格尔纯粹的口头表达更加明显、逻辑上更加严谨。