Usage charging means billing a client or department based on system resource, system administrator time, or raw material (for example, printer paper) usage.

使用收费表示根据客户或部门对系统资源、系统管理员时间、或者原始材料(例如，打印纸)的使用情况进行收费。

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Then the material in the feeding tank enters the feed hose and the charging cylinder via the tee piece under atmospheric pressure.

供料桶内的物料被大气压力压入出进料软管，通过进出料的三通管进入料缸。

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Experimental results point out that the said copolymer electret film is a polar material, i. e. there exist both oriented dipoles and deposited space charges in the film after charging.

实验结果说明，拉伸前后的这类共聚物薄膜均是极性材料，即充电极化后的材料内部同时存在取向偶极子和俘获空间电荷。

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That includes giving new consideration to an old idea -- charging for at least some of the material that most papers now publish online for free.

VOA: special.2009.04.20