revolution mark meaning in Chinese

切削痕迹
旋转标痕

As a component of science and technology , it is called “ blood circulation systems ” of science - technology and society , which are the lifelines of economy and society . in the middle of the 20th century , the information and biology revolution marked the revolution of the modern science and technology
以传播科技信息为主要内容的科技传播已成为科技工作不可缺少的组成部分,并成为连接科技与社会的桥梁,作为一种“血液循环系统” ,是经济社会发展的命脉所系。