您要查找的是不是：
- a layer of gritty dust 一层沙尘
- There's a layer of dust on the computer screen. 电脑屏幕上有一层灰。
- After the wind, there was a layer of dust on the desk. 大风过后， 桌上落了一层灰。
- A layer of skin peeled off her sun-burnt back. 她晒黑的背上掉了一层皮。
- This cake has a layer of chocolate in the middle. 这蛋糕中间有一层巧克力。
- This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上。
- The flood deposited a layer of mud in the street . 洪水过后，街道上积了一层泥。
- This cake has a layer of fruit in the middle. 这蛋糕中间有一层水果。
- There was a layer of dust on the books before I cleaned them. 在我擦拭之前，书上盖着一层灰尘。
- My parents want to make a layer of me. 我父母要我将来做医生。
- The flood deposited a layer of mud in the streets. 洪水在街道上沉淀下一层稀泥。
- A layer of trapped air that serves as insulation. 用于绝缘的密封空气层
- The flood deposited a layer of mud in the street. 洪水过后,街道上积了一层泥。
- These seeds must be covered with a layer of earth. 这些种子必须覆上一层土。
- A layer of paint covering something else. 覆盖在其它东西上的一漆。
- Women have a layer of subcutaneous fat. 女人有一层皮下脂肪。
- Blending Mode for a Layer of lemon is Multiply. 混合模式的一层柠檬是倍增。
- An undershirt adds a layer of protection. 多穿一层不是很热吗？
- Why can a hydrofoil move on a layer of air? 为什么气垫船能靠后方的气流移动？
- Then goes on a layer of bobbin net. 接下来的一层是线圈。
