Halform三卤甲烷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 reflecting mirror半反射镜half-stem-clasping半抱茎的half periodic solution半周期解half deflection method[电] 半偏法half-spiralcurve cut半螺旋法half horizontal killer半行抑制电路,半行抑制器half charge gener ator半电荷发生器half-interval contour半距等高线half-finished bearing半成品的轴承衬瓦half-round head rivet半圆头铆钉