单词	古生代,古生界
释义	古生代,古生界Paleozoic
随便看	plane of optic axis plane of oscillation plane of perspectivity plane of polarization plane of principal stress plane of projection plane of projection plane of propagation plane of reference plane of reflection plane of reflection-- reflective surface plane of reflection; reflective surface plane of refraction plane of regression plane of rotation plane of rotation plane of rupture plane of rupture plane of saturation plane of shear plane of shear plane of site plane of stratification plane of symmetry plane of symmetry; auxiliary