We just leave out the so-called spectator ions: nitrate and sodium, which don't participate directly in the reaction, and end up with a net ionic equation showing just silver and chloride ions reacting to form silver chloride.
我们只是忽略了所谓的旁观离子:硝酸盐和钠, 它们不直接参与反应,最终得到一个净离子方程式, 显示只有银离子和氯离子反应形成氯化银。