回风形式还需依净化室的标准级别来决定。
What kinds of air return should be used depend on standard of clean room.
现在奥运会帆船比赛按照参赛船只的重量和尺寸，将它们划分为多个标准级别。
Olympic racing is now conducted with boats categorised into one-design classes based on similar weights and measurements.
现在奥运会帆船比赛按照参赛船只的重量和尺寸，将它们划分为多个标准级别。
Olympic racing is now conducted with boats categorised into one-design cla es based on similar weights and measurements.
同样，一些油却不是致粉刺性的，例如USP级别的矿物油（美国药典标准级别）
Likewise, some oils are non-comedogenic such as USP grade mineral oil.
用这种方式，可以很容易地再将XML文档精炼成其业界标准级别，并重用它们以进行业界通信。
In this manner, XML documents can be easily stripped to their industry standard level again and re-used for industry communication.
借助WAI - ARIA活动区域，您可以将所有动态更改或更新的内容划分为若干标准级别，并决定如何通知用户并与用户交互。
With the help of WAI-ARIA live regions, you can divide all contents dynamically changed or updated into several criteria levels and then decide how to inform and interact with the users.
借助WAI - ARIA活动区域，您可以将所有动态更改或更新的内容划分为若干标准级别，并决定如何通知用户并与用户交互。
With the help of WAI-ARIA live regions, you can divide all contents dynamically changed or updated into several criteria levels and then decide how to inform and interact with the users.
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