locus of point meaning in English

点轨迹

Locus of point with constant second power average of distances from n fixed points
个定点距离的二次幂平均为定值的点的轨迹
A plane curve formed by the locus of points equidistant from a fixed line and a fixed point not on the line
抛物线到一固定直线和不在直线上某一固定点等距的点的轨迹所形成的平面曲线
The locus of points in a chromaticity diagram that represents chromaticities of the radiation of planckian radiators at different temperatures
色度图中，表征不同温度下黑体辐射的色坐标的点的轨迹。
Locus of points on a surface at which the luminance is the same , for given positions of the observer and of the source or sources in relation to the surface
对于给定的观察者位置，和给定的光源位置或者与光源相关的发光表面来说，该表面或曲线上各点的亮度相同。