名词
中文翻译：钢笔
同义词：
['pen', 'fountain pen']
例句：
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1.He bought a fountain pen for his birthday gift to himself.
他为自己的生日礼物买了一支钢笔。
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2. She wrote her name on the notebook with a fountain pen.
她用钢笔在笔记本上写了自己的名字。
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3.The fountain pen is one of the most popular writing tools in the world.
这支钢笔是世界上最受欢迎的书写工具之一。