折疊的英文：collapse、fold。
1、collapse：v. 倒坍；崩潰；倒下；暴跌、n. 崩潰；暴跌。
2、fold：v. 折疊，對折；交疊；包；失敗，垮臺，關閉、n. 褶痕；褶皺；羊圈。
例句
1、Does this chair fold?這把椅子可以折疊嗎?
2、The tertiary structure refers to the way the protein is bent and folded back on itself in space.三級結構指的是蛋白質自身的彎曲和折疊的方式。
3、Smashing: A bindery process used to compress air out of the folded sheets. See Nipping.壓平:裝訂工序之壹。它把折疊後，紙頁間的空氣壓出。
4、A printed,usually folded handbill or flier intended for free distribution.散頁印刷品免費散發印刷好的通常是折疊的傳單或宣傳物
5、yeast-raised dinner roll made by folding a disk of dough before baking.酵母發酵的正餐面包卷，烘焙前先把生面餅折疊起來。
6、A fold in cloth made by doubling the material upon itself and then pressing or stitching it into place.褶皺衣服上的褶，通過將衣服的材料對折疊，然後在衣料上再壓緊或縫在壹起而制成。
7、Gatefold: Also called Fold-out, Thrown-out.對門折：折疊插頁。
8、Fold or unfold this outline.折疊或展開此概要.
9、Paper folds more easily than cardboard.紙比紙板更易折疊。
10、Folding and cutting darts.折疊和裁剪省道。