halfboxn.无盖轴箱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-word boundary半字界half- active radar半主动雷达half lap scarf joint半叠拼接,半搭接half spherical array半球型阵half-track combine半履带式联合收获机half cardigan fabric半畦编布half seed germination半粒种子发芽half octave bandwidth半倍频程带宽half-round moulding半圆线条half-pipe snowboard单板U型场地滑雪