VOA慢速英语:阿斯利康生产更便宜有效的新冠疫苗

dose - n. the amount of medicine or drug that is taken at one time

regulator - n. government official who controls a public activity by making and enforcing rules

advantage - n. a good or desirable feature

facility - n. building or equipment that is built for a specific purpose

virtually - adv. happening on the internet or online

income - n. money that is earned

distribution - n. the act of delivering something to people