▍原文 The flu has started spreading earlier than usual in some parts of the United States, prompting concerns that cases could soon erupt as millions of people travel and gather for upcoming holidays. The warning signs come as a form of the virus, called H3N2 subclade K, has set off massive outbreaks in Canada and the U.K. No pediatric deaths have been reported so far this season. Still, the early rise in flu activity is unsettling for doctors. ▍語言點 1. spread /spred/ v. （疾病的）傳播、蔓延 2. prompt concerns 引發擔憂 3. case /keɪs/ n. 感染病例 4. erupt /ɪˈrʌpt/ v. （疾病）爆發 5. warning sign （本文）預警信號；警告標志 6. set off outbreaks 疫情爆發 · set off 激起，引發 · outbreak n. （疫情、疾病等的）爆發 7. subclade /ˈsʌbkleɪd/ n. （分類下的）子分支 8. pediatric /ˌpiːdiˈætrɪk/ adj. 兒科的 9. season /ˈsiːzn/ n. （此處特指）流感季 10. flu activity 流感活動 11. unsettling /ʌnˈsetlɪŋ/ adj. 令人不安的 - 搜索【友鄰優課】微信小程序...