前期增加 meaning in English

prior period addition

Sds - page and western blotting of plasmodia of physarum polycephalum showed that cyclin b was present in the plasmodia of s phase , g2 phase , prophase , and metaphase . the molecular weight of cyclin b in physarum polycephalum was around 62kda . cyclin b was gradually accumulated from s phase to metaphase , and reached the maximal level at metaphase , however disappeared in the plasmodia of anaphase and telophase
Westernblotting分析结果表明， cyclinb存在于s期、 g _ 2期、前期和中期的原质团中，分子量约为62kda ， cyclinb的含量从s期到中期逐渐增加，特别是有丝分裂前期增加明显，中期原质团cyclinb含量最高，后末期原质团中没有cyclinb 。
Results dry matter accumulation of aerial part and under ground part of a . dahurica showed " s " curve , dry matter of aerial part gradually increased from the end of july to the early october and got to the peak in mid - october , then gradually decreased ; dry matter of under ground portion increased slowly in earlier stage and became rapidly from the end of august to the end of september , then reduced
结果白芷地上和地下部分干物质积累呈“ s ”型曲线，地上部分干物质在7月底至10月初逐渐增加， 10月中旬达到高峰，随后降低；地下部分干物质前期增加较慢， 8月底至9月底为快速增长期，随后增加稍有减慢。