a piece of ...一片…… two pieces of … 两片…… 例如:a piece of cake 小菜一碟(固定短语) a piece of bread 一片面包.a piece of music 一段音乐.three pieces of page 三页纸.five pieces of work(工艺品) 五件工艺品 a piece of ...一片…… two pieces of … 两片…… 例如:a piece of cake 小菜一碟(固定短语) a piece of bread 一片面包.a piece of music 一段音乐.three pieces of page 三页纸.five pieces of work(工艺品) 五件工艺品