Rails运行所有还没运行的迁移上的up方法。
Rails runs the up methods on all migrations that haven't been run yet.
其焦点在应用程序的迁移上,但同时也介绍了针对分区数据库的设计、配置和操作考虑。
The focus is on application migration, but design, configuration, and operational considerations for a partitioned database is also covered.
以股票价格为例。股票价格随着时间的推移上涨的根本原因在于股票价格与公司正在生产的产品和服务有关。
The fundamental reason why equity prices rise over time, for example, is that they are linked to the goods and services being produced by companies.
Condensation, in other words, is metaphorical in its nature, and displacement is metonymic in its nature.
换句话说,凝缩本质上是比喻,移置本质上是转喻。
OK, that's not so bad. Moving a stack of size 2 if I want to go there, I need to put this one temporarily over here so I can move the bottom one before I move it over.
好,并不那么难,移动上面两个圆盘的话2,我需要把最小的盘子,临时先放到多余的柱子上来,这样才能在把它移过来之前,把最底下的盘子放到目标柱子上。
So it's going to shoot up until the internal pressure and the external pressure are in equilibrium.
活塞将上,移直到内外,压强达到平衡。
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