常見例句用作名詞 (n.)An atoll is a circular reef surrounding a lagoon.環(huán)礁是環(huán)繞著一個瀉湖的環(huán)形礁石。Five marines were sent to clean up the atoll.5艘船只被派往環(huán)狀珊瑚島去肅清殘敵。 返回 atoll