Halfan卤泛群[抗疟药]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 sinusoidn.半正弦曲线half-terete半圆柱状的half inferior半下位的half in doubt半信半疑half - life卵巢癌half a dollar半美元half-spinor半旋子half manpower辅助劳动力half-desert半荒漠,半沙漠half-feeder[机] 半圈补给口