这个词是什么意思？
A phylum of photosynthetic EUKARYOTA bearing double membrane-bound plastids containing chlorophyll a and b. They comprise the classical green algae, and represent over 7000 species that live in a variety of primarily aquatic habitats. Only about ten percent are marine species, most live in freshwater.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000460 · MeSH 2026。
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