词汇	days in milk dim
释义	days in milk dim 泌乳天数
随便看	principal point error principal point location principal point of curvature Principal point offset principal point of objective principal point of photograph principal-point radial principal point radial line plotting principal point refraction principal points principal point the frame principal point trangulation principal point traverse principal point triangulation principal polarizabilities principal polarization plane principal pollutant Principal pollution principal polygonometric network principal polygonometrlc network principal port principal portion principal radius principal radius of curvature principal rafter