评论
打印
Welcome to the Voice of America's News Words.
欢迎收看美国之音：新闻词汇。
In the United States, COVID-19 cases are on the rise.
在美国，新冠病例正在上升。
Breakthrough
突破
Experts say the Delta variant is one reason.
专家表示，德尔塔变种是原因之一。
People who are not vaccinated against COVID-19 make up the most cases and deaths.
没有接种新冠疫苗的人是感染新冠并死亡的主要群体。
Among fully vaccinated people, evidence shows a small minority getting breakthrough infections.
证据显示，在接种完疫苗的人群中，只有一小部分突破性感染病例。
In medicine, a breakthrough infection happens when a virus breaks through the barrier a vaccine provides.
在医学上，当病毒突破疫苗提供的屏障时，就会发生突破性感染。
The word breakthrough also means an important discovery that happens after a long time of trying to understand something.
“breakthrough”还指长时间试图理解某事之后的重大发现。
