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VOA慢速英语:欧洲药管局称可能发现血栓同阿斯利康疫苗之间的联系
2021-04-08来源:和谐英语
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setback - n. a problem that makes progress more difficult
specific - adj. precise or exact
factor - n. one of the thing that causes something to happen
inflammation - n. a condition in which a part of your body becomes, red, swollen and painful
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