分析词义

"Flu" 是流行性感冒的简称，流行性感冒被认为是一种令人特别不舒服，可能甚至是有害或致命的疾病。

列举例句

1. Many people get a flu shot before winter. (很多人在冬天之前打流感疫苗。)
2. She caught the flu and had to stay in bed for a few days. (她患上流行性感冒，必须在床上呆几天。)
3. Flu is very contagious and spreads quickly in schools and workplaces. (流感非常具有传染性，在学校和职场中会迅速传播。)

词根分析

"Flu" 是 "influenza" 的缩略语，这个词源于意大利文 "influenza di freddo"，意思是 "来自寒冷的影响"。

词缀分析

因为 "flu" 是一个简写的词汇，所以它并没有真正的词缀。

发展历史和文化背景

"Flu" 这个词在20世纪初的大流感大流行(被称为西班牙流感疫情)后，被广泛地用来指代流行性感冒。

单词变形

作为名词，"flu" 没有单复数形式，动词，时态，形容词，副词等的变形。

记忆辅助

联想 "flu" 和 “飞流“的读音，想象流感就像一种飞速流动的病毒。

小故事

Last winter, Jack felt feverish and weak. "Must be the flu," he thought. His mother made soup and told him to rest. (去年冬天，杰克觉得发热，身体虚弱。“肯定是得了流感，”他想。他的母亲为他做了一碗汤，叫他好好休息。)

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