名词
中文翻译：背翼
同义词：
['back', 'backbone']
例句：
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1.The bird's back-flap is a crucial part of its flight.
鸟的背翼是飞行的关键部分。
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2.The team's back-flap player was injured during the game.
球队的后翼球员在比赛中受伤了。
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3.The back-flap of the suit is designed to provide extra protection for the wearer.
这件西装的后翼设计用来为穿着者提供额外的保护。