By default, the optimizer considers this type of scan.

默认情况下，优化器考虑这种类型的扫描。

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In the previous section you learned about one type of access method, index scan (IXSCAN), and one type of join method, nested loop join (NLJOIN).

在之前的部分您已经了解了一种类型的访问方法，即索引扫描(IXSCAN)，和一种类型的联接方法，即嵌套循环联接(NLJOIN)。

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At the same time, the researchers observed what was going on inside the mind using a type of brain scan called functional magnetic resonance imaging.

让她们进行一项电脑测试，对答对者可获得一定酬金。同时，研究者们利用磁共振脑功能扫描观察她们的大脑内部状态。

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But a year ago Medicare cut the price it pays for imaging, so Gruen gets paid 15% to 50% less for each order, depending on the type of scan.

FORBES: Cranking Up the Volume

After the stress test, your cardiologist may or may not opt to have you undergo another type of CT test called a Calcium-score Screening Heart Scan.

FORBES: My Visit with a Cardiologist, and What You Should Know About Your Heart

If we are to have medicines tailored to our own versions of specific diseases, rather than the one-size-fits-all type of potions and pills with which we're treated today, then each of us will need a genome scan in our medical files.

ECONOMIST: Peering into your medical future is risky