前不久，纽约一所私立高中里一个十分优秀的男生跳楼自杀。 "The suicide raised a red flag about depression among teenagers," 这起自杀事件对青少年的抑郁症敲响了警钟。最近有研究发现，白天极度困倦是心脏疾病的预警前兆。 "Excessive daytime sleepiness is a red flag for cardiovascular disease," 好的，今天我们学习的词是red flag...
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672 red flag
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今天我们要学的词是red flag。 Red flag, 是指预示危险的示警红旗。华尔街经纪人麦道夫的投资骗局去年曝光。事实上， "A business reporter raised a red flag on Madoff back in 2001," 一位财经记者早在2001年就对麦道夫提出了疑问。
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