我经常数学考试不及格。

I always fail in math tests.

youdao

黄金分割比率也称为神圣分割比例，它是一个数学无理常数，其值约为1.618033987。

The golden ratio, also known as the divine proportion, is an irrational mathematical constant with a value of approximately 1.618033987.

youdao

爱因斯坦将其称为宇宙常数，并略带厌恶地将它加入他的理论，因为如果没有宇宙常数，它的理论在数学上优美极了。

Einstein called the something the cosmological constant and added it to his theory with some distaste, because the work had been so mathematically beautiful without it.

youdao

It is true mathematically, you can add two numbers, but you've got to ask yourself,"What am I doing as a physicist when I add these two numbers?"

在数学上它是正确的,你可以引入这两个常数,但是你需要问问自己,当我引入这两个常数时,这么做有什么物理意义

耶鲁公开课 - 基础物理课程节选

And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.

那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。

麻省理工公开课 - 固态化学导论课程节选