Popper transformed the visual angle and put forward the theory of "progressive social engineering" to "open society" from "the closed society".
波普尔从"封闭社会"向"开放社会"转化视角提出"逐步的社会工程"理论;从社会科学"有限理性"视角提出"社会技术"范畴,并把"社会技术"视为"政治的科学基础";从社会本体的主体际性视角分析了"社会技术"(社会工程)与"物理技术"(物理工程)的关系。
The effects of temperature,time of reaction,amount of catalyst,time of esterifying,time of decompression step by step,etc, on molecular weight of PLA were studied.
以L-乳酸单体为原料,用逐步减压缩聚法合成了相对高分子量的聚乳酸。