It is so called "time-dependent covariates" that the values of covariates change over time.

共变数的值会随著时间而改变时，我们称之为时间相依之共变数。

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It is so called "time-dependent covariates" that the values of covariates change over time.

共变数的值会随著时间而改变时，我们称之为时间相依之共变数。

youdao