In order to identify it, it is necessary to increase the number of observation equations.
为了进行识别，必需要增加观测方程的数目。
From observation, there are a number of best practices that these projects share.
从观察来看，有许多这些项目所共用的最佳实践。
From observation, there are a number of best practices that these projects share.
从观察来看，有许多这些项目所共用的最佳实践。
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