"We, the undersigned, call upon [relevant authority/government/organization] to take immediate action towards [issue at hand]."
"It is imperative that immediate steps be taken to address the [issue at hand]."
"We respectfully request that [relevant authority/government/organization] implement measures to address the [issue at hand]."
"The [issue at hand] has reached crisis proportions and demands immediate attention."
"As concerned citizens/residents, we strongly urge [relevant authority/government/organization] to take action to resolve the [issue at hand]."
"We demand that [relevant authority/government/organization] prioritize the [issue at hand] and take all necessary measures to address it effectively."
英语句子的语序一般是固定的：主语在前，谓语在后，这叫陈述语序。谓语的全部或一部分(助动词或情态动词)放在主语之前的现象称为倒装。倒装有两种情况：语法倒装和修辞倒装。因为语法结构而必须倒装的，叫语法倒装；为达到某种修辞目的而倒装的，叫修辞倒装。我们学习倒装的主要目的是增加对英语句式多样性的认识，以便在写作和口语中使用，这也是我们学习英语语法的主要目的。
英语倡议信是A Letter of Advice。在不断进步的时代，我们都可能会用到倡议书，倡议书是日常应用写作中的一种常用文体。