在帆船上使用场景广泛的一种绳结，如用于将一股绳索围绕套在木桩，支柱，或任何其他固定结构上。
Definition: A common knot used in many circumstances on sailboats, such as to tie a loop of line around a piling, stanchion, or any other fixed structure.
这有可能是蓄意之举，例如在帆船赛中为防止抢跑而将船降速的一种办法。
This may be done deliberately, for example, to slow the boat down to prevent crossing the starting line too soon in a sail race.
帆船上的一种龙骨，可以从船底部(hull)升起或放下。
A type of keel on a sailboat that can be raised or lowered from the bottom of the hull.
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