flatten /ˈflætin/ vt. (使)弄平：flatten out wrinkled silk 拉平发皱的绸子；to flatten a rough surface把凹凸不平的表面弄平Martinflattened a book out in front of him.马丁在面前摊开一本书。the hurricane flattened thousands of homes.飓风把成千上万的家园夷为平地。