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慢速英语:美国考虑将疫苗接种剂量减半以便给更多人接种
日期:2021-01-05
Words in This Story

dose – n. the amount of a medicine, drug, or vitamin that is taken at one time

immunity – n. the power to keep yourself from being affected by a disease

surge - n. a move that is very quick and sudden in a particular direction

contagious – adj. able to be passed from one person or animal to another by touching
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