名词中文翻译
中文翻译：红字
同义词：
['red-letter day', 'red-letter note', 'red-letter warning']
例句：
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1. The red-letter note was a secret message that led to the discovery of a treasure.
那张红字条是一个秘密信息，它引领发现了一处宝藏。
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2.The red-letter day marked the beginning of a new era in history.
那个红字日标志着历史新纪元的开始。
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3.The red-letter warning was issued after a series of natural disasters.
在一系列自然灾害之后发布了红色警告。