VOA慢速英语:Two Ways to Track Santa Around the World(翻译)

eager - adj. very excited and interested

countdown - n. the act of counting down the time that remains before something (such as the launch of a rocket) happens — usually singular

clock - n. a device that shows what time it is

translation - n. words that have been changed from one language into a different language

charitable - adj. done or designed to help people who are in need

category - n. a group of people or things that are similar in some way

tradition - n. a way of thinking, behaving, or doing something that has been used by the people in a particular group, family, society, etc., for a long time

interactive ​- adj. designed to respond to the actions, commands, etc., of a user

arcade - n. a place with many games

streaming - adj. playing continuously as data is sent over the Internet