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VOA慢速英语:辉瑞公司称其新冠疫苗对12-15岁儿童有效

2021-04-01来源:和谐英语

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Words in This Story

placebo –n. a substance that is given to a patient in a medical study that has no physical effect

chills –n. (pl.) a feeling of being cold

regulator –n. an official who works for the part of the government that controls a public activity and enforces rules

swelling –n. a condition in which a part or area of the body increases in size