1. 替换语法
:[range]s/pattern/string/[c,e,g,i] :[range]s#pattern#string#[c,e,g,i] :[range]s+pattern+string+[c,e,g,i]:[range]s/pattern/string/[c,e,g,i]
:[range]s/pattern/string/[c,e,g,i] :[range]s#pattern#string#[c,e,g,i] :[range]s+pattern+string+[c,e,g,i]:[range]s/pattern/string/[c,e,g,i]