n a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water
n (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)
n action intended to keep a country politically neutral or exclude it from a possible war
n action intended to nullify the effects of some previous action
n. 中立状态,[军]压制,[化]中和(作用),[电]中和,平衡