Some say that once the costs of power generation are factored into the equations, electric cars are only half as efficient with regard to energy use as modern diesel vehicles.

有人认为，一旦将发电成本综合考虑在内，在能源使用方面，电动汽车的效率只能达到目前现代柴油车的一半。

youdao

So let's start with a case when we have some number of the equations say n equations and n unknown.

所以让我们从一个例子入手，当我们有一些方程式，假定n个方程，n个未知数。

youdao

This paper states the expressions of solution of some differential equations with delay.

给出了一类具有滞量的微分方程解的部分表达式。

youdao

But instead in this chemistry course, I will just tell you the solutions to differential equations. And what we can do is we can start with some initial value of r, and here I write r being ten angstroms. That's a good approximation when we're talking about atoms because that's about the size of and atom.

但在这个课里，我会直接，告诉你们微分方程的解,我们可以给距离r一个初始值,我这里把r取10埃,当我们讨论原子时,这是一个很好的近似,因为原子的尺寸。

麻省理工公开课 - 化学原理课程节选

He would spend the next three decades, ending with some equations scribbled while on his deathbed in 1955, stubbornly criticizing what he regarded as the incompleteness of quantum mechanics while attempting to subsume it into a unified field theory.

NPR: Einstein: Relatively Speaking, a Complicated Life