a plastic pen with a metal ball at the top that rolls ink (= coloured liquid for writing, etc.) onto the paper compare ballpoint伯罗圆珠笔 Word Origin1940s: named after László József Bíró (1899–1985), Hungarian inventor of the ballpoint.
👨🏻🏫 Mr. Ng 牛津詞典 📚 – oxford.mister5️⃣.net
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