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 power width半功率宽度half-time gear半速齿轮half left-face半面向左转half global beam半球波束half counterbeat划半圆击打halftone shading半色调明暗处理half-wave Joss半波损失half link-verb半链接动词half-loop loss半环路损耗half as again asadj.一倍半于