“useful work”概念、定义、翻译-科学时代

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。

单词	useful work
释义	机械工程词汇手册 useful work 有用功
随便看	two-dimensional grating two-dimensional grating two-dimensionality painting two-dimensional laser scanning system two-dimensional lattice two-dimensional material two-dimensional model two-dimensional model of structure of intelligence two -dimensional model of the structure of intelligence two-dimensional motion two dimensional nozzle two-dimensional sampling theory two-dimensional system（2D system） two-dimensional wave two dimensional wind tunnel two dimensional wing two dimensional wing test two -dimentional character two-dimentional composition two-dollar broker two-dot chain line two-drum boiler two-drum hoist two-drum winch two educational systems

useful work