This process, called photosynthesis, led the way for bacteria to multiply into one of Earth's earlier structures: cyanobacteria, formerly called “blue-green algae”.
这个过程-光合作用过程使得这些细菌聚集起来形成地球上的最初的多细胞结构：藻青菌就是所知的“蓝藻”。
Earth structure
原声例句
美国历史频道纪录片《宇宙》
地心游记-The journey to the heart of the Earth
True, it seemed most hazardous to strike a blow of the hammer in this part of the earth's structure.
确实，用锤子敲击地球结构的这一部分似乎是最危险的。
英语百科
Earth structure
An earth structure is a building or other structure made largely from soil. Since soil is a widely available material, it has been used in construction since prehistoric times. It may be combined with other materials, compressed and/or baked to add strength. Soil is still an economical material for many applications, and may have low environmental impact both during and after construction.
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