半穿甲弹的英文缩写是sapp,全拼是Semi armor piercing projectile。例句:1、半穿甲弹侵彻过程中壳体强度的数值分析。Numerical?Analysis?of?Armor?Pierced?Bullet?Shell?Security?during?the?Penetration.2、半穿甲弹初速高,直射距离远,射击精度高,穿透能力强,后效好。Semi armor piercing projectile has high initial velocity, long direct range, high shooting accuracy, strong penetration ability and good aftereffect.3、半穿甲弹主要用于对付坦克,装甲车,自行火炮,舰船和飞机等。Semi armor piercing ammunition is mainly used to deal with tanks, armored vehicles, self-propelled guns, ships and aircraft.