abbreviation for blind carbon copy: a copy of a letter or email that is sent to someone without the knowledge of the other person or people it is sent to屏蔽抄送,副本密送(blind carbon copy的缩写)
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net切換為繁體中文