halfarcn.半弧光灯halfn.一半；下半场；半学年adj.一半的；不完全的adv.一半地；不完全地half speed shaft半速轴half tone signal半色调信号halfthrough arch半穿式拱half-dry state半干态half-consonantn.[语]半辅音adj.半辅音的half-desmosome半桥粒half giant swing大摆翻上half word buffer半字缓冲器half-blindness半盲half-life time半衰期； 半寿期