In fact, you can think of finding children on a per-type basis as a visitor operation that can be encapsulated in a visitor itself.

实际上，您可以将按照类型查找子节点的操作视为可封装在访问者自身中的访问者操作。

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In this method, we will create two columns per data type in the query: one for ascending ordering, the other for descending ordering.

在这种方法中，为查询中的每个数据类型创建两个列：一个用于升序排序，另一个用于降序排序。

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To cache the records from the alternate source, you need a cache per value type returned.

要缓存这些来自备用源的记录，您需要为返回的每种值类型设置一个缓存。

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Earlier this year an American study found that more than two hours of TV viewing per day significantly increased the risk of type-2 diabetes and cardiovascular disease, and more than three hours of daily viewing increased the risk of premature death.

BBC: Can watching TV make you die younger?

With a continuous shooting speed of up to 5.0 frames per second (fps) united with 9 all cross- type AF focus points, the new EOS Rebel T5i allows photographers the opportunity to shoot with ease, even in challenging shooting situations.

ENGADGET: Canon unveils EOS T5i and Rebel SL1, the world's smallest DSLR (hands-on)

Rizk and Machol found a similarly wide range for the valuations for health impacts by fuel type: 19 to 45 cents per kilowatt-hour for coal, 8 to 19 cents per kilowatt-hour for oil, and 1 to 2 cents per kilowatt-hour for natural gas.

FORBES: How Much Do Health Impacts From Fossil Fuel Electricity Cost The U.S. Economy?