单词	同名核线
释义	同同名核线--相应核线
随便看	principal room principal room (in china always facing south) principal root principals principal sacrificer principal scale principal scope of a book principal seat principal section principal section of crystal principal section of quadric principal sector principal sentence principal series principal series lines principal shaft principal shear strain principal shear stress principal sheet principalship principal shock principal signal principal solar semidiurnal component principal solution principal spectrum