keep constant

基本解释

But, in a situation like this, to clarify things, we'll actually say explicitly what it is that we want to keep constant.
但在类似的情形中，为了清晰明了，都会明确指出，什么保持恒定不变。
But, what we keep constant is v, or in terms of x and y, that's y minus x constant. And, that's why they are not the same.
保持v不变，也就是关于x和y的函数v=y-x恒定，这就是为什么它们不是一码事。
This function does a good bit of position-munging, but it all boils down to a simple idea: Keep constant the precise distance between the mouse cursor and the target object.
该函数做很多位置整理（position-munging）工作，但都可归结为一个简单的思想：不断保存鼠标光标与目标对象之间的精确的距离。

On the other hand, temperature, volume and pressure are variables that are much easier in the lab to keep constant.
另一方面，温度，体积和压强,在实验室中比较容易保持恒定。
麻省理工公开课 - 热力学与动力学课程节选
STUDENT: PROFESSOR: Yes, thank you. All right, it is constant. You keep sitting back there where I can't get to you. Thank you very much.
学生：【不解中】,教授：是的，是常数，如果，就是常数,你坐在那儿一动不动我没法找到你。
麻省理工公开课 - 计算机科学及编程导论课程节选
How do I keep p1 constant while I'm lowering the volume?
怎么保持压强不变,而减小体积？
麻省理工公开课 - 热力学与动力学课程节选

At the company's operations center, employees keep constant tabs on coordinating operations across the globe, including everything from world events to weather.
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