名词
中文翻译：圆珠笔
同义词：
['ballpoint', 'fountain pen例句：1. I need to write down my ideas on a piece of paper with a ballpoint pen.（我需要用圆珠笔在纸上写下我的想法。）']
例句：
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1. I need to write down my ideas on a piece of paper with a ballpoint pen.
我需要用圆珠笔在纸上写下我的想法。
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2.She uses a ballpoint pen to draw detailed sketches.
她用圆珠笔绘制详细的素描。
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3.The ballpoint pen is the most popular writing instrument in the world.
圆珠笔是世界上最受欢迎的书写工具。