名词
中文翻译：双折
同义词：
['double fold', 'double wing']
例句：
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1.The butterfly's twifoldis so delicate it can barely be seen.
这只蝴蝶的翅膀如此纤细，几乎看不见。
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2.The scientist discovered a new way to usetwifolds for energy storage.
科学家发现了一种新的能量存储方法。
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3. The twifolds of thewings are designed to allow thebird to fly more efficiently.
鸟的翅膀上的褶皱设计是为了使飞行更加高效。