瞬时效应 meaning in English

instantaneous effect
temporal effect

Mechanics course mainly includes the description of movement of objects , the instantaneous effect of strength , spatial build - up effect of strength , temporal build - up effect of strength , nonindividual body mechanics , mechanical wave and sound , relativity , inalterability and covariability and mechanics foundation of the theory of relativity
力学主要内容包括物体运动的描述，力的瞬时效应，力的空间累积效应，力的时间累积效应，连续体力学，机械波和声，相对性、不变性与协变性和相对论力学基础等。