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
I was so tired
我太累了
I won the most valuable prize!
我赢得了最高的奖赏！
This is a good example of his poetry.
这是他诗作的一个好例子。