It's helpful to create one sample that contains every possible element in order to test the schemas and any software written to process the documents.
为了测试架构和任何被编写来处理文档的软件，有必要创建一个包含每种可能元素的样例。
The flow rate of water sample in SDI test decays with time exponentially. The mechanical block is the main blockage process of membrane fouling.
SDI测试中水样流速随时间按指数规律衰减，机械堵塞是滤膜的主要堵塞污染过程。
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