慢速英语:世卫组织批评“疫苗民族主义”呼吁全球合作

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pandemic - n. a contagious illness that crosses national boundaries

global - adj. worldwide

accelerator - n. an item or system that speeds things up

diagnostic - adj. a way of examining an illness to figure out what it is

twist - v. to pull out of shape

late-stage - adj. at the end of its process

epidemic - n. a contagious illness that is not controlled