bunker
noun [ C ] uk/ˈbʌŋ.kər/ us/ˈbʌŋ.kɚ/
(SHELTER)
掩体;地堡
a shelter, usually underground, that has strong walls to protect the people inside it from bullets or bombs
(GOLF)
UK (US sand trap)（高尔夫球场上的）沙坑
in golf, a hollow area of ground filled with sand, that is difficult to hit a ball out of