Submarine depth and rolling control near the water surface is a kind of nonlinearity control problem. The change of submarine mass, speed and ocean wave make it difficult to design of control system.

潜艇近水面运动情况下的深度及纵倾控制问题是一种非线性控制问题，潜艇自身质量及航速的变化、以及外界不规则海浪使得控制系统难于设计。

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It involves the relationship of energy, mass and the speed of light, written as the letter c.

VOA: special.2010.07.16

We give you a very rich table of constants that's got all kinds of things from the mass of the electron to the speed of light, and all this stuff to the requisite number of significant figures. And, in addition, you are allowed to take in one sheet of paper, 8 1/2 x 11 one sheet 8 1/2 x 11, you can write anything you want on it.

我们会给你一个很详实的常量表,将会涉及很多方面，从元素的电子,到光速，这些内容到有效数字的定量,还有，你们可以带来一张纸，纸的规格是，可以写任何你们想写的东西。

麻省理工公开课 - 固态化学导论课程节选

The difference in speed also means a difference in mass of 50%.

VOA: special.2009.01.20

Elsewhere, mass speed-dating events are under way.

ECONOMIST: Singletons are getting some help finding a mate

And it seemed very fitting to talk about big data, insight acceleration and real time analytics in the very place where mass and speed of light got combined for posterity, more than a century ago.

FORBES: In-memory Computing and the Wisdom of the Telco Crowd

Einstein's special relativity theory that says energy equals mass times the speed of light squared underlies "pretty much everything in modern physics, " said John Ellis, a theoretical physicist at CERN who was not involved in the experiment.

MSN: Neutrinos clocked moving at faster-than-light speed