Hb
abbr. [軍] 厚膛壁身管（Heavy Barrel）
?? 牛津釋義
HB
abbr
縮寫 = (of lead used in pencils) hard black (ie medium hard) （指鉛筆芯）硬黑（即硬度適中）
an HB pencil 一支HB的鉛筆. Cf 參看 B, H.
??? 情景例句
Thank you, thank you!
謝謝 謝謝
No one is answering the phone..
沒有人接電話。
Much to the aristocrat's amusement,
貴族感到非常好笑的是