名词
中文翻译：Unknown
同义词：
['pen', 'nib', 'ink']
例句：
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1. The pen is my favorite writing instrument.
这支笔是我最喜欢的书写工具。
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2. The pen was used to write the name on the wall.
这支笔被用来在墙上写字。
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3. The pen has a fine point that makes it easy to write with.
这支笔有一个细尖，使得书写变得容易。