infinitesimal quantity meaning in English

无穷小

Forsaking the conception of cause , mathematics seeks law , that is , properties common to all unknown , infinitesimal quantities
数学放弃原因的概念而寻求法则，也就是寻求一切未知的无限小的元素的共同性质。
Only by assuming an infinitely small unit for observationa differential of historythat is , the homogeneous tendencies of men , and arriving at the integral calculus that is , taking the sum of those infinitesimal quantities , can we hope to arrive at the laws of history
只有采取无限小的观察单位历史的微分，即人们的共同倾向，并运用积分法即得出这些无限小的总和，我们才有希望了解历史的规律。