a double-layered wall的用法和样例：
- A 100% Mountain Merino Knit Wool beanie, featuring a double layered headband and embroidered Bird logo on the side.
- Electrostatic repulsion organized into a double layer in which each layer possesses equal Charge.
- All cells are surrounded by a [[membrane]] that is composed of a double layer (bilayer) of phospholipids.
- Tarim's HaDe thin sand reservoir which is named margin reservoir is a double layer,super deep,super thin,particular low abundance reservoir.
- A double layer light emitting device is reported which based on a triphenylamine-containing PPV with sandwiched structure of ITO/polymer/Alq3/Mg: Ag/Ag.
- A double layer Permeable Reactive Barrier (PRB) experiment was designed to study the feasibility of in-situ remediation of groundwater contaminated by landfill leachate.