VOA慢速英语:Looking for Answers to Asthma 2025-01-27 | 分类：英语常识 | 浏览:1999BOB DOUGHTY: And I'm Bob Doughty. Spring has returned to the United States.
World Asthma Day 世界哮喘日 2019-10-14 | 分类：英语常识 | 浏览:1999World Asthma Day is on the first Saturday of May, it is a day to call for the pu
