noun🔗Share環礁A type of island consisting of a ribbon reef that nearly or entirely surrounds a lagoon and supports, in most cases, one to many islets on the reef platform. Atolls have a unique geology, so not all islands with a reef and a lagoon are atolls"The airplane flew over a beautiful atoll, a ring of small islands surrounding a calm, blue lagoon. "飛行機は、穏やかな青いラグーンを囲む小さな島の輪である美しい環礁の上を飛びました。geologygeographyenvironmentnatureoceanChat with AIVocabulary GamePractice Reading
