halflapn.半折叠(半叠盖；半周)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-day system半日制half neighborhood半邻域half/full fare半/全价half-and-halfn.两者各半之混合物；混合啤酒half-sclerotome半(生骨)节half a dozen eggs六个鸡蛋half-band width半谱带宽度half-open point四开道岔, 不密贴道岔half tone writing半色调记录half-tide basin半潮船坞