1·Recommendatory notes on the use of lliese documents are also presented.
指出使用该等文件的注意事项。
2·National standards and trade standards are divided into compulsory standards and recommendatory standards.
国家标准、行业标准分为强制性标准和推荐性标准。
3·The model is applied in 7th chapter to evaluate allocation plans of Heihe River Basin water resources, and offers recommendatory allocation plan.
第七章运用模型对黑河流域水资源配置方案进行评价，给出推荐配置方案；