1 a large piece of material used on a bed 被单；床单 ☞picture at bed 见bed插图

2 a piece of paper that is used for writing, printing, etc on （书写、打印等用的）纸: a sheet of notepaper 一张信纸Write each answer on a separate sheet. 答一道题用一张纸。 ☞Look at balance sheet. 参看balance sheet。

3 a flat, thin piece of any material, especially a square or rectangular one 薄片（尤指正方形或长方形的）: a sheet of metal/glass 一块金属薄板╱玻璃

4 a wide, flat area of sth 一大片: The road was covered with a sheet of ice. 路上覆盖着一层冰。