Software requirements specification, according to the national standard format to complete a simple online book system.
说明：软件需求说明书，根据国家标准格式完成简单的网上购书系统。
According to the National Standard, at least 14 elements in mineral water must be analyzed, which is a complicated job.
国家标准规定，矿泉水中至少有14种元素需要检测，这一工作是非常繁杂的。
According to the national standard for cement, cement quality inspection work, this article summarizes the following points.
根据国家水泥检测标准，对于水泥质量检测工作，本文总结了以下几个要点。
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