1. during bicellular stage, quadracellular stage and multicellular stage, content of DNA increase slowly, and reach the peak at pear-shaped embryonic stage keep high level at mature embryonic stage.
在二细胞胚、四细胞胚、多细胞胚时期DNA缓慢增长，随着胚性愈伤组织的发育，DNA的含量在梨形胚时期达到高峰；成熟胚的DNA含量虽有所下降，但仍维持较高水平。
2. The failure process of fiber concrete is: elastic stage, crack stage, crack development stage and fracturation stage.
相应的纤维混凝土断裂过程包括：弹性阶段、开裂阶段、裂缝发展阶段、断裂阶段。
3. In this study, the imaging features of kidney were analyzed according to the stages of the disease, that is the pyretogenesis stage, shock stage, oliguria stage, and diuretic stage.
本文分析了肾脏影像改变与出血热患者在发热期、休克期、少尿期、多尿期中肾脏改变和病情的关系。
4. In terms of the life cycle, an enterprise may experience the following stages: introduction stage, growth stage, maturity stage and decline stage.
企业之兴衰可概分为导入期、成长期、成熟期、衰退期。
5. The soil water of dune-fixing forest separates 4 stages by season change: soil water consuming stage, soil water accumulating stage, soil water balancing stage, and soil water steady stage;
固沙林土壤水分依季节变化可划分为4个时期：土壤水分消耗期、土壤水分积聚期、土壤水分缓失平衡期、土壤水分稳定期；
