求翻译：2. 2. 2 全反式维甲酸（ATRA）对S-D大鼠主动脉内皮细胞增殖的影响 ATRA在1-100 nmol/L对S-D大鼠主动脉血管内皮细胞有剂量依赖性增殖作用（P＜0.01），在100 nmol/L时对血管内皮细胞的增殖作用达到峰值，对内皮细胞的增殖率达41.4%；但ATRA 1000 nmol/L对血管内皮细胞却无明显增殖作用，反而有轻微抑制作用，但与对照组比较无统计学差异（P=0.191）（表2），DMSO对S-D大鼠主动脉血管内皮细胞生长无明显作用（P=0.588）。是什么意思？

2.2. 2 full anti-type dimension formic acid (ATRA) on S-D large rats active pulse endothelial cell proliferation of effect ATRA in 1-100 nmol/L on S-D large rats active pulse vascular endothelial cell has dose rely on sexual proliferation role (P<0.01), in 100 nmol/L Shi on vascular endothelial cell of proliferation role reached peak, on endothelial cell of proliferation rate up 41.4%; but ATRA 1000 nmol/L on vascular endothelial cell but no obvious proliferation role, instead has minor inhibition, but and controlled group comparison no statistics differences (P=0.191) (table 2), DMSO on S-D large rats active pulse vascular endothelial cell growth no obvious role (P=0.588).