[ C or U ] a type of paint that you put on a surface before the main paint is put on底層塗料;底漆
us/ˈprɪ.mɚ/ [ C ] old-fashioned a small book containing basic facts about a subject, used especially when you are beginning to learn about that subject入門書,初學者讀物
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net切换为简体中文