裂化

例句：

1. 1. The rock was so hard that it couldn't be easily split by hand tools.
   这块岩石太硬了，不能用手工工具轻易地劈开。
2. 2. The old tree had to be cut down due to its age and the risk of a major crack.
   由于年久失修和存在重大裂缝的风险，这棵老树不得不被砍倒。
3. 3. The ice on the lake began to crack as the temperature dropped below freezing point.
   湖面上的冰开始因温度下降而出现裂缝。