A hem on something such as a piece of clothing is an edge that is folded over and stitched down to prevent threads coming loose. The hem of a skirt or dress is the bottom edge.
VERB
縫…的褶邊;給…鑲邊
If you hem something, you form a hem along its edge.
例句
Turn under and hem the outer edges...翻下來縫外側(cè)的邊。Each dress is hemmed and scrupulously checked for imperfections.每條連衣裙都縫上了褶邊，并經(jīng)過嚴格的檢查，不允許有任何瑕疵。