This standard is proposed by State Bureau of Building Materials Industry.
本标准由国家建筑材料工业局提出。
However, there is a lack of a uniform compilation standard for such teaching materials.
然而各种华语作为第二语言教材缺乏明确统一的水平等级标准作为编写参考。
However, there is a lack of a uniform compilation standard for such teaching materials.
然而各种华语作为第二语言教材缺乏明确统一的水平等级标准作为编写参考。
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