separate-layer water shut off

例句：

1. 1.We need to separate the layers of the cake to make it easier to eat.
   我们需要将蛋糕的层次分开，以便更容易地食用。
2. 2.The plumber shut off the water supply to the house while he was fixing the leak.
   水管工在修理漏水时关掉了家里的供水。
3. 3.Before starting the engine, please ensure that the water is separated from the gasoline tank.
   启动发动机前，请确保水与汽油箱分离。