A ballpoint pen is a writing tool that uses a tiny, rotating ball at the tip to release ink onto paper. The ball, which is usually made of metal, turns as it is used, allowing the ink to flow smoothly and evenly. Ballpoint pens are popular for their reliability, low cost, and the ability to write quickly without smudging. They come in various colors and tip sizes and are widely used for everyday writing tasks.

英語での「ballpoint pen」の定義と意味

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