mascot
noun [ C ] uk/ˈmæs.kɒt/ us/ˈmæs.kɑːt/
吉祥物
a person, animal, or object that is believed to bring good luck, or one that represents an organization
a team mascot 球队的吉祥物
The Olympic Games always have an official mascot. 每届奥运会总会有一个官方吉祥物。