单词	sand cockle
释义	英華☞SOLEN
随便看	polar subsidiary cell polar subtangent polar surface polar symmetry polar system polar system of co-ordinate polar system of co-ordinates polar tangent polar tangential coordinates polar telescope polar tetrahedron polar theory polar therapy polar thin-layer anisotropy polar topographic coincidence polar tractrix polar transformation polar translocation polar transmission polar transport polar triangle polar trihedral polar tropopause polar trough polar tube