名词
中文翻译：后腿骨
同义词：
['hinge', 'spine例句：1. The rear spar of the horse is a critical part of its structure.（马的后腿骨是其结构的关键部分。）']
例句：
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1. The rear spar of the horse is a critical part of its structure.
马的后腿骨是其结构的关键部分。
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2. The rear spar was damaged in the accident.
事故中后腿骨受损。
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3.The rear spar is used to support the weight of the horse.
后腿骨用于支撑马的重量。