exothermic chemical reaction

例句：

1. 1.The reaction is exothermic, meaning it releases heat.
   该反应是放热的，意味着它释放热量。
2. 2. The furnace uses natural gas as fuel and produces a lot of heat, making it exothermic.
   这个炉子使用天然气作为燃料，产生了大量的热量，因此它是放热的。
3. 3. The chemical reaction is exothermic, which means it releases heat during the process.
   化学反应是放热的，这意味着它在过程中会释放热量。