changes of fluorescence

例句：

1. 1. The changes in the fluorescence of the sample were recorded using a spectrophotometer.
   使用分光光度计记录了样品荧光强度的变化。
2. 2. The researcher found that the changes in the fluorescence of the sample could be attributed to the presence of certain chemicals.
   研究人员发现，样品荧光强度的变化可以归因于某些化学物质的存在。
3. 3.The changes in the fluorescence of the sample were used to determine the concentration of the substance.
   样品荧光强度的变化被用来测定物质的浓度。