美国科学家研究了144个牙科病人，其中差不多有一半是红发人。

Scientists in the United States studied a group of 144 dental patients almost half of whom had red hair.

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比如，开发人员使用XPath在XML文件中发现病人的牙科记录，然后使用XSLT将病人信息打包成html显示在浏览器中。

For example, a developer USES XPath to find the dental records of a patient in an XML file and USES XSLT to package the patient information in an HTML view that is displayed in a browser.

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在我工作牙科很忙，但有一位病人总是迟到。

At the busy dental office where I work, one patient was always late.

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