The island has a mountainous, nearly impenetrable interior, white-sand beaches, and famous blue lagoon defined by an offshore coralreef.
岛上有连绵不断地山体,白色沙滩和由离岸珊瑚礁确立的著名蓝色泻湖。
2
Barrier reef: a long, narrow ridge of coral or rock parallel to and relatively near a coastline, separated from the coastline by a lagoon too deep for coral growth.