那出戏要演多长时间？
第三个问题可能会使我们感兴趣，那确实使我们感兴趣，这就是：如果它能幸存，那能幸存多长时间呢？
Third question that might interest us, that does interest us, is this: If it survives, how long does it survive?
假设如果你有一大堆领域对象，你从最上层的Object类进行隐式选择查询，那该需要多长时间啊！
Imagine how long it would take if you had a large set of domain objects and you implicitly selected from the top object class.
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