单词	half-angle of projection
释义	half-angle of projection 圆锥半角
随便看	institution perfection institution performance institution plan institution private property institution-provided software institution ranking institution-reared child institution reasons Institution reform institution reformation institution reforms institution registering the patient institution related institution rent institution research institution restriction institution review board institution revolution institutions handling overseas Chinese affairs institutions higher education institutions human resources institutions innovation institutions matter Institutions,Mental institutions of a modem university