cost constituent的用法和樣例：
例句
- Conclusions The main contributing factors of EPI cost were the township level, followed by the village and county level.
結論湖南省計劃免疫人均成本構成中鄉級所佔比例最大，其次是村級，縣級。 - The components of the central sewage disposal cost and the main affecting factors are discussed, and the cost allocation problem is described in a formalized way.
討論了污水集中治理的成本構成和影響這些成本的主要因素，並對成本分攤問題進行了形式化描述。
