radial-velocity survey视向速度巡天
radial-velocity orbit分光解
radial l velocity径向速度
radial-velocity standard视向速度标准星
radial-velocity trace视向速度描迹
radial quadratic velocity level振动均方速度级
radial quadratic velocity径向振动均方速度
radial-velocity spectrometer英语
N（名词） the component of the velocity of an object, esp a celestial body, directed along a line from the observer to the object 径向速度