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几乎是谎言，那就是说希思罗机场安。

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，杰斯还看，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。