名词
中文翻译：索引卡
同义词：
['index card', 'index sheet', 'reference card']
例句：
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1. She used an index card to mark the spot where she had found the book.
她用一张索引卡片标记了她找到书的地方。
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2. The teacher gave each student an index card with their name on it.
老师给每个学生一张带有他们名字的索引卡片。
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3. The index card was helpful for me to find the information I needed quickly.
这张索引卡片对我来说快速找到所需信息很有帮助。