backstretch n. （美）非终点直道
back porch 后沿
back crotch seam 后裆缝
back crotch line 落裆线
back crotch curve 后档弧线
back crotch width 后裆宽
attach back crotch stay 绱大裤底
back crotch
回来的胯部
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A convenient pant is characterized in that a run-through opening is arranged from a crotch to a front and back waist and the opening is provided with a slide fastener so as to close the opening.
一种方便裤，其特征在于：由裤裆至前后腰部设有贯通的可以敞开的开口，在开口上设有可将开口闭合的拉链。
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