nitrite ion

例句：

1. 1. The nitrite ion in the water reacts with oxygen to form nitric acid.
   水中的亚硝酸离子与氧气反应形成硝酸。
2. 2. Nitrite ions are used as indicators in chemical analysis.
   亚硝酸离子在化学分析中用作指示剂。
3. 3. The nitrite ion is a weak acid that can be converted into nitric acid by heating.
   亚硝酸离子是一种弱酸，可以通过加热转化为硝酸。