-
[2019年上半年VOA常速英语] VOA常速(翻译+字幕+讲解):反疫苗运动或加重美国麻疹疫情
While measles persist in other parts of the world mostly because of a lack of resources to vaccinate people, in the United States, a growing number of people are reluctant to vaccinate their childre..2019-04-20 编辑:Emma