single grain structure

例句：

1. 1.The grains of rice are separated by a thin layer of water in the rice cooker.
   在电饭煲中，大米颗粒之间有一层薄薄的水层。
2. 2.The structure of the new building is designed to be energy efficient.
   这座新建筑的结构设计得非常节能。
3. 3. The single grain structure of the wheat kernel is essential for its nutritional value.
   小麦粒的单粒结构对其营养价值至关重要。