The AmericanLungAssociation (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)已经发布了对抗感冒和流感的新指南,其重要意义之一是能够快速地将两者区分开来。
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Things are not as bad as they once were but, according to the AmericanLungAssociation, Los Angeles is still the worst city in the United States for levels of pollutants.
虽然现在的情况不像以前那么糟糕,但是根据美国肺脏协会的数据,洛杉矶仍然是美国污染物水平最高的城市。
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According to the AmericanLungAssociation, 35 percent of American children live in homes where regular smoking occurs.