HB

abbr 缩写 = (of lead used in pencils) hard black (ie medium hard) （指铅笔芯）硬黑（即硬度适中）: an HB pencil 一支HB的铅笔. Cf 参看 B, H.

hawkish, hawkishness, hawser, hawthorn, hay, hay fever, hay-fork, hay-maker, haymaking, haystack (also hayrick), haywire, hazard, hazardous, hazardously, haze, hazel, hazel-nut, hazily, haziness, hazy, HDL cholesterol, he, he'd, he'll, he's, he-, he-man, head, head cheese, head first, head for, Head of State, head off, head on, head start, head towards, head up, head wind, head-dress, head-hunter,