四级The American Lung Association (ALA) has issued new guidelines on combating colds and the flu, and one of the keys is being able to quickly tell the two apart.
美国肺脏协会(ALA)发布了关于对抗感冒和流感的新指南,其中一个关键是能够快速区分两者。
2005年1月大学英语四级(CET-4)真题
四级More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses—flu A, B and C. There is no cure for either illness, but the flu can be prevented by the flu vaccine (疫苗), which is, for most people, the best way to fight the flu, according to the ALA.
200多种病毒会引起感冒症状,而流感是由三种病毒引起的——甲型、乙型和丙型流感。这两种疾病都无法治愈,但流感疫苗可以预防(疫苗), 根据ALA的说法,对大多数人来说,这是对抗流感的最佳方法。
2005年1月大学英语四级(CET-4)真题
四级The ALA notes that it may be particularly difficult to tell when infants and preschool age children have the flu.
ALA指出,可能特别难以判断婴儿和学龄前儿童何时感染流感。
2005年1月大学英语四级(CET-4)真题
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