在选择专业之前，你要对专业和类别有一定的了解。船舶与海洋工程装备类包含哪些专业？有哪些专业前景比较好？让我们来看看下面的内容！
Basically, what I\'m trying to do is to wipe out all data in my CoreData persistent store, then import new data. How would you do this? It seems that the simplest solution is call [NSPersistentStoreCo
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