VOA慢速英语:青少年获得最高科学奖

cryptography – n. the art of writing or solving codes

trillion - n. the number 1,000,000,000,000 : one thousand billion

cosmic – adj. always used before a noun : of or relating to the universe or outer space

incredible – adj. difficult or impossible to believe

grateful – adj. feeling or showing thanks

promote – v. to make people aware of (something, such as a new product) through advertising : to make (something) more popular, well-known

round – n. one in a series of similar events

semifinalist – n. a person who wins in either one of two matches, games, or contests to decide which people or teams will be in the final part of a competition

positive – adj. good or useful

audience – n. a group of people who gather together to listen to something (such as a concert) or watch something (such as a movie or play) : the people who attend a performance