| 释义 |
coral reefnounA ridge of rock in the sea formed by the growth and deposit of coral: the small island is enclosed in the middle of the coral reef...- On a global scale, coral bleaching is the largest threat to the world's coral reefs.
- The protected coral reef is close enough to shore to explore in safety with a snorkel.
- Coral reefs are among the world's most productive ecosystems.
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