Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
礁；暗礁；珊瑚礁
先理解核心含义，再看它在真实句子里的用法。
礁；暗礁；珊瑚礁
A chain or ridge of rocks, sand, or coral at or near the surface of water.
The divers explored a colorful coral reef teeming with fish.
潜水员们探索了一片色彩斑斓、鱼类繁多的珊瑚礁。
位于或接近水面的一连串岩石、沙子或珊瑚
A chain or range of rocks, sand, or coral lying at or near the surface of the water.
为减少在强风中暴露的面积而卷起并系住的帆的一部分
A portion of a sail rolled and tied down to lessen the area exposed in a high wind.
疥疮；任何发疹性皮肤病
The itch; any eruptive skin disorder.
水面下的岩石或珊瑚脊
a submerged ridge of rock or coral near the surface of the water
Strong currents can make it dangerous to swim near a reef.
强烈的洋流会让在礁石附近游泳变得危险。
The ship's captain checked the map to avoid the reefs along the coast.
船长查看海图，以避开沿岸的暗礁。
Choose the next layer that will help you use reef with more confidence.
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发长 /iː/ 音 (如 see, free)
Use reef naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.