正作用的英文

direct action solenoid valve

• 正:    the first month of ...
• 作用:    act on; affect
• 校正作用:    corrective action

例句与用法

1. Positive reference group
   正作用参照团体
2. Technological introduction itself is negative to economic growth as well as research and development , but their interaction is positive which indicates that research and development on the base of technological introduction can hasten economic growth
   由知识存量的增加所导致的技术进步中，单独的技术引进和研发对经济增长是负作用，而两者之间的交互项却是正作用，说明在技术引进的的基础上必须进行研发，才能达到对经济增长的促进作用。