慢速英语:新冠疫苗在三万名志愿者中开始最终试验
日期:2020-07-28
Words in This Story
dose - n. the amount of medicine that is taken at one time
stage - n. a particular period in the development of something
reflect - v. to show something
fever - n. a body temperature that is higher than normal
chill - n. a cold feeling
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