petition letter的用法和樣例：
例句
- As an important channel of polities participation, the letter petition system safeguards people's democratic rights.
摘要信訪是我國公民政治參與的重要渠道，是實現和維護人民群眾民主政治權利的具體形式。 - In the petition work to make outstanding achievements of the units or individuals, by the executive authorities will be awarded.
對在信訪工作中做出優異成績的單位或者個人，由有關行政機關給予獎勵。
