drop testing machine

例句：

1. 1. The drop testing machine was usedto test the accuracy of the chemical formula.
   滴定试验机被用来测试化学公式的准确性。
2. 2. The drop testing machine is essentialfor analyzing the concentration of a solution.
   滴定试验机对于分析溶液的浓度至关重要。
3. 3. The drop testing machine can be usedto measure the pH level of a solution.
   滴定试验机可以用来测量溶液的pH水平。