Thereisacommon,usuallyroundobjectthatyoucanseeeverydaya...
問題詳情：Thereisacommon,usuallyroundobjectthatyoucanseeeverydayanditappearsinmanyexpressions—buttons!Buttons,whicharemadeofmetalorplastic,arefoundonallsortsofclothing.Theyfastenorconnectonepieceofclot...