The crust of alga-sand particle was early form of crust by desert alga.

提出了藻沙粒结皮是荒漠藻结皮的早期形式。

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A reservoir is built in housetop, have structure of wall of edaphic lay aside, some of alga, fish is put inside, form small-sized ecosystem with assuring water quality fresh.

在屋顶建设一个蓄水池，有土壤贮壁结构，里面放些藻类、鱼类，形成小型生态系统以保证水质的新鲜。

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A reservoir is built in housetop, have structure of wall of edaphic lay aside, some of alga, fish is put inside, form small-sized ecosystem with assuring water quality fresh.

在屋顶建设一个蓄水池，有土壤贮壁结构，里面放些藻类、鱼类，形成小型生态系统以保证水质的新鲜。

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