求翻译：2. 1培养的S-D大鼠主动脉内皮细胞的鉴定 倒置显微镜下内皮细胞形态观察：原代培养的S-D大鼠主动脉内皮细胞呈单层生长，互不重叠，呈铺路石状镶嵌排列，细胞呈多角形，边界清楚（图1）。是什么意思？

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Cultivating the S . 2 1 rats - D xiphoid process within the skin cells within the skin cells identify inverted microscope Observation: The patterns of cultivation S - D rat xiphoid process within a single-layer skin cells grow to each other and do not overlap, writ petition mosaic paving stones arra

2. Under 1 raise S-D big mouse aorta endothelial cell appraisal inverted microscope endothelial cell shape observation: The original generation of raise S-D big mouse aorta endothelial cell assumes the monolayer to grow, does not overlap mutually, assumes the paving stone shape crustification arrang

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