As stated earlier, there are a variety of responsibilities surrounding the creation, use, and maintenance of XML data, and each come with a corresponding set of tool needs.

正如前面所提到的，围绕XML数据的创建、使用和维护，存在着不同的责任，每个责任又有着相应的工具需求。

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The workshop and mini iteration should cover a variety of use case types: datacentric, workflowcentric, data maintenance, reporting, and so on.

研讨会和微小迭代应当覆盖各种用例类型：数据集中，工作流集中，数据维护，报告，等等。

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The trainer simulates a variety of maintenance situations and provides realistic feedback to students' actions.

教练机模拟各种维护状态，并对学员的行为提供现实的反馈。

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Because most people with low vision are elderly, their disabilities from sight loss are amplified and many require help with transportation, shopping, home maintenance and a variety of other everyday needs.

WHITEHOUSE: Employing Technology to Restore Vision

Crews conduct a variety of science experiments and perform station maintenance during their six-month stay on the outpost.

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