The probability density function (PDF) is constructed from the time distributions of signal and backgrounds and the relations among time, time uncertainty, mass, and massdifference variables.
根据信号、本底的时间分布以及时间、时间误差、质量、质量差等变量之间的关系，构建概率密度函数。
2
How could one explain this difference in mass?
那么要如何解释质量上的这个差异呢？
3
I am using fancy words today. And the moment of inertia — the difference with a mass is that the moment of inertia is defined about some axis.You choose an axis.