吸热反应

例句：

1. 1. The reaction between the two substances is a classic example of an exothermic reaction.
   两种物质之间的反应是放热反应的经典例子。
2. 2. During the combustion process, heat is absorbed by the fuel and converted into energy.
   在燃烧过程中，燃料吸收热量并将其转化为能量。
3. 3. The absorption of solar energy by the earth's surface is crucial for life on our planet.
   地球表面吸收太阳能对地球上的生命至关重要。