After you set TRACKMOD to YES, you must back up the database before allowing applications to change data.
在将TRACKMOD设置为YES之后，您必须在允许应用程序更改数据之前备份数据库。
At the same time they have set up back-up data centres in other locations that can take over the activities at any time if a major disaster occurs.
同时，它们还在其它地点建立了后备数据中心，可以随时在重大空难发生时采取行动。
Based on the measured ground stress data, a 3d non-linear finite element back analysis numerical model for ground stress is set up and the fault and fissure concentrated zone is simulated.
结合实测地应力资料，建立了三维非线性有限元地应力反演分析数值模型，模拟了断层及裂隙密集带。
Based on the measured ground stress data, a 3d non-linear finite element back analysis numerical model for ground stress is set up and the fault and fissure concentrated zone is simulated.
结合实测地应力资料，建立了三维非线性有限元地应力反演分析数值模型，模拟了断层及裂隙密集带。
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