1. The rain fell in sheets.
   大雨滂沱。
2. We must always double the sheets before we put them away.
   被单收起来前必须先折叠好。
3. Roll dirty laundry in a sheet.
   把待洗的衣服用被单裹起来
4. The door was sheet metal welded on to the frame of iron.
   门是焊接在一个铁框上的金属薄板。
5. Gold leaf: A thin sheet of real gold.
   金叶:真金薄片。

　1个名词解释