翻譯P.30

One example of the importance of ions in our study of environmental science is the nitrate ion, a nutrient essential for plant growth. Figue2-3 shows measurements of the loss of nitrate ions from the deforested area in the controlled experiment run by Bormann and Likens. Chemical analysis of the water flowing through the deams of the cleared forest area showed a 60-fold rise in the concentration of nitrate ions compared to water running off of the uncleared forest area.
一個重要性的離子例子在我們環境科學的研究內是那些硝酸鹽離子，一個必要的營養在植物生長時 。