“perpetual motion machine of the first kind”概念、定义、翻译-科学时代

单词	perpetual motion machine of the first kind
释义	物理学词汇手册 perpetual motion machine of the first kind 第一类永动机
随便看	birth custom birth custom birthday attack birthday bun with bean paste filling birthday cake Birthday of Avalokiteśvara Birthday of the Prophet birthday paradox birth--death and immigration process birth-death ratio birth defect birth history birth injure birth injury birth interval birth interval-specific fertility rate birth limitation birth limitation rate birthmark birth omen birth omen birth order birth order fertility birth order ratio birth order-specific fertility rate

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。