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放宽疫苗专利规定 但问题依然存在
日期:2021-05-07
Words in This Story

patent – n. an official document that gives a person or company the right to be the only one that makes or sells a product for a certain period of time

summit – n. a meeting or series of meetings between the leaders of two or more governments

waiver – n. an official document indicating that someone has given up or waived a right or requirement

complex – adj. not easy to understand or explain : not simple
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