mean solar time square平均平方
mean solar time vector均值向量
mean solar time trajectory平均轨道
mean solar time term中项
mean solar time tension平均张力
mean solar time sun平太阳
mean solar time stress平均应力
mean solar time velocity平均流速
mean solar time springs平均大潮
N（名词） the time, at a particular place, measured in terms of the passage of the mean sun; the timescale is not precisely constant 平均日照时间→see mean solar day