the main reasons are the restrictions from the feudal education system and the imperial examination system the obstruction from the small-scale peasant economy and the defects in the science and technology of ancient china
究其原因，主要有封建教育制度和科举制度的制约、小农经济的阻碍以及中国古代科学技术的缺陷
以上为机器翻译结果，长、整句建议使用 人工翻译 。