atoll是什么意思音标:英 ['ætɒl]美 ['ætɔ:l]

n. 环状珊瑚岛, 环礁

n. an island consisting of a circular coral reef surrounding a lagoon

atoll的用法和例句：

1.Until a cargo ship happened upon a nearbarren atoll.

直到一艘货船偶然发现了一个近乎荒芜的环礁

2.And there's enough of it to transform barren coral atolls into fertile groves.

而这些足以让 贫瘠的珊瑚环礁变成繁茂的森林

3.Rising above the waves, a coral atoll's reef surrounds a shallow lagoon.

珊瑚环礁从波浪中升起 包围住一片浅浅的泻湖

4.Tuvalu's nine atolls and islands are home to 12,000 people.

图瓦卢的九座环礁和岛屿上 居住着一万两千人