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AI摘要
这篇深度新闻报道解释了禽流感(H5N1)的科学原理,包括病毒如何跨物种传播、为何波及奶牛以及何时可能演变为大流行。非常适合希望积累公共卫生、流行病学和病毒学词汇的B2级学习者,涵盖\"重配""致病性""泛动物流行\"和"持续社区传播\"等术语。
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CEFR 等级
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核心词汇 (12)
你是一个好人。(You are a good person.)
人是指一个单独的人类个体。
病毒是一种仅在生物活细胞内复制的微小感染源。
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