求翻译：采用两步法来检验面板数据的平稳性，首先提取面板数据回归模型的残差序列 ，同时运用LLC检验、Hadri检验和IPS检验三种方法对残差序列 进行单位根检验，如表2。是什么意思？

Two-step method to examine the panel data stationarity, first extract the residuals of the panel data regression model, the use of llc test, hadri inspection, and three methods of ips test the unit root test on residuals, as shown in Table 2.

A two-step method to verify that the Data panel, first extract smooth panel data regression model of the residual series, and use testing, Hadri LLC IPS inspection and testing of 3-way residual 单位根 inspection sequence, as shown in Table 2.

Uses two steps to examine the kneading board data the stability, first withdraws the kneading board data return model the residual error sequence, simultaneously using the LLC examination, the Hadri examination and IPS examines three methods to carry on the unit root examination to the residual erro

Using Panel data in two steps to verify stability, first extraction sequence panel data regression model of residual and application of inspection and test, Hadri LLC IPS inspection sequence of three methods on residual unit root tests, such as table 2.

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