Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
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
