Migration upgrades the applied profile version in the model.
迁移更新了模型中应用的概要文件版本。
From the transfer of the specific model, the U.S. transfer of rural surplus labor migration patterns are free.
从转移的具体模式来看，美国农村剩余劳动力的转移属于自由迁移模式。
It is necessary to run the migration inside an AbstractTransactionalCommand because model elements will be modified by the migration process.
需要在AbstractTransactionalCommand中运行迁移，因为模型元素将会由迁移过程更改。
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