When a closure "captures" a variable it "lifts" the variable out of its local scope and effectively moves it into an anonymous object.

当一个闭包“捕获”一个变量时，它就会将这个变量提取出它的本地范围，移到一个匿名对象里。

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A transient variable enables the application to keep a copy in local memory, but rebuilds the object if using the backup copy.

临时变量允许应用程序在本地内存中保留副本，但可以在使用备份副本的情况下重新构建对象。

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To fetch elements from the collection, you had to know the type of object in the collection so you could cast it back to the appropriate local variable.

要从集合中提取元素，您必须知道集合中对象的类型，以将其强制转换为合适的局部变量。

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