petitioner

这位申请人向法院提交了离婚诉状。

The ___petitioner filed divorce papers with the court.

这位请愿者已经收集了足够的签名来支持修建新图书馆的提议。

The ___petitioner has collected enough signatures to support the proposal for a new library.

请愿人向政府提交了一份关于环境保护的正式请求。

The ___petitioner submitted a formal request to the government regarding environmental protection.