above threshold ionization

例句：

1. 1. The researchers found that the concentration of certain chemicals above the threshold level could have adverse effects on human health.
   研究人员发现，某些化学物质的浓度超过阈值水平对人类健康有不良影响。
2. 2.The experiment demonstrated the importance of maintaining a balance between different elements in the environment above the threshold level.
   实验展示了在环境元素之间保持平衡的重要性，这种平衡超过了阈值水平。
3. 3.In this study, we focused on the effect of temperature above the threshold level on the performance of the material.
   在本研究中，我们关注了温度超过阈值水平对材料性能的影响。