原理英语怎么说

原理英语怎么说：principle

1. The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another. (能量守恒原理表明能量不能被创造或销毁，只能从一种形式转化为另一种形式。)

2. The principle of supply and demand dictates that when the supply of a good or service is low and demand is high, the price will increase. (供求关系原则规定，当一种商品或服务的供应量较低而需求量较高时，价格会上涨。)

3. The principle of cause and effect states that every action has a reaction, and every effect has a cause. (因果关系原则表明每个行动都有一个反应，每个效果都有一个原因。)