VOA慢速英语:东京将新冠病毒警报系统提升至最高级别

alert - n. something (such as a message or loud sound) that tells people there is some danger or problem : an alarm or signal of danger

shopping - n. the activity of visiting places where goods are sold in order to look at and buy things (such as food, clothing, etc.)

monitor - v. to watch, observe, listen to, or check (something) for a special purpose over a period of time

ahead - adv. in, into, or for the future

resident - n. someone who lives in a particular place

tourism - n. the activity of traveling to a place for pleasure

transmission - n. the act or process by which something is spread or passed from one person or thing to another