光速是一个不变常数。
光速是一个不变常数。
这篇报告描述了某一个人为假定的自然界的基本物理常数，似乎并不是一直保持恒定不变。
The report describes how one of the supposed fundamental constants of Nature appears not to be constant after all.
伏拉汤姆：好吧，迈克尔，和我们在一起，别离开，因为我们想跟你谈谈另一个恐怖的东西，阿尔法常数可能不那么“恒定不变”，好吗？
FLATOW: All right, Michael, stay with us because we want to talk to you about another spooky thing, this alpha constant that may not be so constant, okay?
由于我们假定物理定律是不可改变的，永恒的，所以我们也不得不假定常数也是不变的。
And because we assume that the laws of physics are immutable, eternal - we have to assume the constants don't change either.
宇宙基本常数，比如电磁力强度之类的精细结构常数，符号位“alpha ”，它们因为被假定为不变量而得名。
Fundamental constants such as the strength of the electromagnetic force - the so-called fine-structure constant, or alpha - get their name from the fact that they are supposedly the same everywhere.
理想气体常数不变，温度也不变，因此,是负的nRT，积分从v1到v2，dv除以。
The ideal gas constant doesn't change, temperature doesn't change, and so v we just have minus nRT integral V1, V2, dV over V.
随着测试频率的增加，测得的材料介电常数略有下降，而居里温度与温度系数基本维持不变。
Moreover, with the increase of the working frequency, the dielectric constants of the PST materials decreased, but the Curie temperature and temperature coefficient basically had no variation.
基本常数不变仅是一个假设。
随着烧结条件的不同，介电常数几乎不变，但介电损耗以及介电常数的温度系数则较为敏感。
The dielectric constant was almost a constant, while the dielectric loss and temperature coefficient of dielectric constant were sensitive to the sintering conditions.
这个特性在原胞的晶格常数变化的- 3% - 20%范围内保持不变。
This character remains in the variation range of -3%-20% of lattice constant.
传统的确定性经济批量模型通常都假定需求率是常数，且每周期的相关费用是固定不变的。
Traditional deterministic economic Lot-Size models assume that the demand rate is a constant, that the order cost is inflexible during every order cycle.
如果有一个值在应用程序中始终不变，则可以定义一个命名常数，并用该常数取代文本值。
If you have a value that never changes in your application, you can define a named constant and use it in place of a literal value.
本文在其他边界条件不变的条件下将叶片扩压器改为无叶扩压器进行了三维可压定常数值模拟。
A numerical simulation is preformed by replacing vane diffuser with vaneless diffuser with the other boundary conditions unchanged.
如同它的名称所示，常数用来储存应用程序执行过程中维持不变的值。
Constants store values that, as the name implies, remain constant throughout the execution of an application.
对于低通滤波器，比时间常数更长的信号将会保持不变地通过，而比时间常数短的信号将会被滤掉。
For a low-pass filter, signals much longer than the time constant pass through unaltered while signals shorter than the time constant are filtered out.
利用二次曲面的不变量判定到一定点和一定平面(定直线)的距离之比为常数的空间点的轨迹。
Make use of constant measure of second order curved face, and judge the space figure that arrive the fixed point and the fixed flat surface (fixed straight line) distance's ratio is a constant.
2271年，物理常数重新拟定、变化(物理定律不变化？)
2271 - Restart physical constants are changed. (Laws of physics changed?)
数值模拟同时还发现流动性指标属于一种统计平均值而并非恒定不变的常数值，这将有助于对流动性评价指标的重新思考和定位。
Bi-channel fluidity test modulus simulation suggests that different channel formed different length in a practical experiments, it also proved fluidity indexes should be an average value.
数值模拟同时还发现流动性指标属于一种统计平均值而并非恒定不变的常数值，这将有助于对流动性评价指标的重新思考和定位。
Bi-channel fluidity test modulus simulation suggests that different channel formed different length in a practical experiments, it also proved fluidity indexes should be an average value.
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