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
However, through my experience in business at home and abroad.
但从事国内外的商业的经历中。
Marry in haste, and repent at leisure.
草率结婚后悔多。
I know it's not necessary. I want to do it.
我知道不必这样，可是我愿付？/span>