求翻译：对于有些时间序列，虽然它们自身是非平稳的，但其某种线性组合却是平稳的，这种稳定性的线性组合被称为协整方程，可以解释为变量的长期均衡关系。两个变量的协整检验要求它们是同阶单整的。因此，在检验变量关系前，我们必须首先进行单位根检验。是什么意思？

For some time series, although their own non-stationary, but some linear combination is a smooth, linear combination of this stability is called cointegration equation, can be interpreted as a long-term equilibrium relationship of the variables. Two variables cointegration test requirements that the

For some time-series, although they themselves are non-smooth, but it is a linear combination of a smooth, this stability has been known as linear combination of the equations, you can help explain the long-run equilibrium for the variable. Two variables of the test is required of them by the same b

Regarding some time series, although their own right and wrong steady, but its some kind of linear combination is actually steady, this kind of stable linear combination is called cooperates the entire equation, may explain for the variable long-term balanced relations.Two variable association entir

For some time series, even though they own is smooth, but its a linear combination is smooth, such stability of linear combinations is called Cointegration equations, can be interpreted as variables of long-run equilibrium relationship. Cointegration test requirements of the two variables they are w

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