When you get a few levels down, it's easy to forget where you started, or what the previous level was called.
当您向下几层后，很容易忘记您开始的地方，或者上一层的名称。
Should you need it, it is also possible to rollback a migration to a previous level which you select, again with a single command.
如果需要，还可以使用一个命令将迁移回滚到您选择的以前级别。
Nor can Japan rely on exports for future growth; to the extent that it had enjoyed an export bubble, foreign demand will not return to its previous level.
日本不可能依靠出口实现进一步的增长；就日本受惠于出口泡沫这一点来说，国外需求不可能回到它原来的水平。
Multigrid method is a nested iteration, wherein the computed solution on the previous level serves as starting point for the iteration on the new level.
多重网格法是一种套迭代技术，前一层上的迭代解作为新一层上迭代的初始解。
The learner at this level solves practical problems by applying information comprehended at the previous level.
这个层次的学习者通过运用在以前各层次理解的知识去解决实际问题。
The important thing is this: every level is thinking about how your opponent thinks on the previous level.
最重要的是：每一层思考都必须要建立在对手思考的层次之上。
AIA exams are held twice a year around the world and are split into three blocks, each of which build on the knowledge and skills achieved in the previous level.
AIA每年在全球举办两次考试。考试分为三部分，各部分分别针对前一阶段知识和技能掌握程度进行考核。
AIA exams are held twice a year around the world and are split into three blocks, each of which build on the knowledge and skills achieved in the previous level.
AIA每年在全球举办两次考试。考试分为三部分，各部分分别针对前一阶段知识和技能掌握程度进行考核。
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