noun🔗Share暗礁，礁石。 A chain or range of rocks, sand, or coral lying at or near the surface of the water."Divers explored the colorful reefs teeming with fish just off the coast. "潜水员们探索了近海处色彩斑斓、鱼类繁多的暗礁。geographyoceanenvironmentnaturegeologybiologyChat with AIVocabulary GamePractice Reading
noun🔗Share矿脉，矿床 A large vein of auriferous quartz; hence, any body of rock yielding valuable ore."The old miners believed the richest gold was hidden deep within the quartz reefs of the mountain. "老矿工们相信，最丰富的金子隐藏在山中石英矿脉的深处。geologymineralChat with AIVocabulary GamePractice Reading
noun🔗Share缩帆部，缩帆。 A portion of a sail rolled and tied down to lessen the area exposed in a high wind."During the sudden squall, the experienced sailor quickly tied in the reefs to reduce the sail area and maintain control of the boat. "在突如其来的飑风中，经验丰富的船员迅速地收紧了缩帆部，以减小帆的面积，从而保持对船的控制。nauticalsailingChat with AIVocabulary GamePractice Reading
noun🔗Share暗礁，礁石。 A reef knot."The sailor quickly tied the two ropes together with a pair of reefs. "水手迅速地用两个平结将两根绳子系在了一起。nauticalsailingChat with AIVocabulary GamePractice Reading
verb🔗Share收帆, 缩帆。 To take in part of a sail in order to adapt the size of the sail to the force of the wind."The sailors had to reef the sails as the wind grew stronger, making the boat more stable. "随着风力逐渐增强，水手们不得不收帆，这样船才能更加稳定。nauticalsailingtechnicalChat with AIVocabulary GamePractice Reading
verb🔗Share收紧缰绳，猛拉缰绳 To pull or yank strongly, especially in relation to horse riding."The nervous rider reefs on the reins, trying to control the horse's sudden burst of speed. "紧张的骑手猛拉缰绳，试图控制马匹突然爆发的速度。animalsportactionChat with AIVocabulary GamePractice Reading
verb🔗Share缩帆，收帆。 (of paddles) To move the floats of a paddle wheel toward its center so that they will not dip so deeply."Reef the paddles."把桨板收起来。nauticalsailingtechnologymachineChat with AIVocabulary GamePractice Reading
noun🔗Share疹子，皮疹 The itch; any eruptive skin disorder."After working in the garden, she developed reefs on her arms from an allergic reaction to the plants. "在花园里干完活后，她因为对植物过敏，手臂上起了疹子。medicinediseasebodyappearanceChat with AIVocabulary GamePractice Reading
noun🔗Share头皮屑，头屑。 Dandruff.""He brushed his dark jacket because it was covered in reefs after scratching his head." "他挠完头后，深色外套上落满了头皮屑，所以他掸了掸。bodyappearancemedicineChat with AIVocabulary GamePractice Reading
