藻类必须每天收集，提取藻类的油脂成分以及去除水份这些工序成本昂贵且耗费能源。
The algae must be harvested every day. Extracting the oily components and removing the water is expensive and energy intensive.
分析藻类组成成分表明，微污水带种类多于乙型中污水带种类。
The floral analysis shows that in the algae of Simian Mountains, Cligosaprobic species are more then ?
一些藻类的细胞壁的化学成分有所不同，例如硅藻属的细胞壁含有硅化物，石灰质藻类的细胞壁含有钙。
The walls of some algae differ, e. g. the silica boxes enclosing diatoms, and the calcareous layer on the cell walls of calcareous algae.
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