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1·The residual term in the regression model is the noise generated by the omitted variables that influent dependent variable in the model. The time series model can fit this noise.

回归模型的残差项反映了对被解释变量有影响但未列入解释变量的因素所产生的噪音，这部分噪音可由时间序列模型进行拟合。

2·Psyco virtual-time variables represent Python objects that could potentially be built if the need arose, but whose details are omitted until they are. For example, consider an assignment like

Psyco 虚拟时变量代表了需要时可能会被构建的 Python 对象，但是这些对象的详细信息在它们成为 Python 对象之前是被忽略的。

3·An optional data frame in which to look for variables with which to predict. If omitted, the fitted values are used.

一个可选的数据框寻找与预测的变数。如果省略，用来拟合值。