gusset
noun [ C ] uk/ˈɡʌs.ɪt/ us/ˈɡʌs.ɪt/
（用于加固、加大或增加衣服舒适度的）衬料
a second layer of cloth that is sewn into a piece of clothing to make it larger, stronger, or more comfortable
silk panties with a cotton gusset 衬有纯棉布料的丝绸短裤
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