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
You've got it.
没问题。
We'll pack the goods according to your instruction.
我们将按你方的要求进行包装。
At this time, the man downstairs was trying to sleep.
这时楼下人正试图入睡。