名词
中文翻译：红字日
同义词：
['important days', 'significant days']
例句：
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1. She spent many red letterdays with her family.
她和家人度过了许多重要的时光。
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2. These are the red letter daysin our history.
这是我们历史上的重要日子。
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3. Theycelebrated their red letter days with friends andfamily.
他们与朋友和家人一起庆祝了这些重要的日子。