cylinder double layer sand siftering machine

例句：

1. 1. The cylinder is the shape of a cylindrical object.
   圆柱是圆柱形物体的形状。
2. 2. The cylinder is used to store liquids in bottles.
   圆柱用于瓶子中储存液体。
3. 3. The cylinder is the core of the machine.
   圆柱是机器的核心部分。
4. 1. The double doors open into a large room.
   双开门通向一个大房间。
5. 2.The double layer sand siftering machine can process two layers of sand at once.
   双层沙筛选机可以同时处理两层沙子。
6. 3.The double-sided tape has sticky and non-sticky sides.
   双面胶带有粘性和非粘性两面。
7. 1.The layer of snow on the ground is thicker than the previous one.
   地面上的雪层比前一层厚。
8. 2.The layer of soil is rich in nutrients.
   土壤层富含养分。
9. 3.The layer of ice on the lake is about three inches thick.
   湖面上的冰层大约有三英寸厚。