(钮扣) button;(皮带扣) buckle;knot;tache;clasp ;
例句:
She unbuttoned her coat.
她解开了外衣的扣子.
She used a needle to sew the button onto the shirt.
她用针把扣子钉到衬衫上.
He unbuttoned his shirt.
他解开衬衣扣子。