a ridge of jagged rock, coral, or sand just above or below the surface of the sea
礁;礁脉;沙洲。
a vein of ore in the earth, especially one containing gold
(尤指含金的)矿脉。
each of the several strips across a sail which can be taken in or rolled up to reduce the area exposed to the wind
缩帆部。
take in one or more reefs of (a sail)
缩(帆),收(帆)
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reefing the mainsail in strong winds .在强风中收缩主帆。
shorten (a topmast or a bowsprit)
缩短,收进(中桅,船首斜桁)。
"late 16th cent. (earlier as