spencer's solution

例句：

1. 1. The chemical reaction in this solution is very complex.
   这种溶液中的化学反应非常复杂。
2. 2. This solution is used to test the purity of the sample.
   这种溶液用于测试样本的纯度。
3. 3. The scientist used a special solution to solve the problem.
   科学家使用一种特殊的溶液来解决这个问题。