Hb
abbr. [军] 厚膛壁身管（Heavy Barrel）
📖 牛津释义
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.
🗣️ 情景例句
Who do you think are better drivers: man or women?
你觉得男人跟女人，谁开车开得好一些？
I meet the boy whose aunt is a secretary.
我遇到那个男孩的姑妈是秘书。
Shortly after it was launched, the pie committee went to a local inn to celebrate.
盘子下水后不久，馅饼委员会成员们来到当地一家小酒店庆贺。