cost constituent的用法和样例：
例句
- Conclusions The main contributing factors of EPI cost were the township level, followed by the village and county level.
结论湖南省计划免疫人均成本构成中乡级所占比例最大，其次是村级，县级。 - 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.
讨论了污水集中治理的成本构成和影响这些成本的主要因素，并对成本分摊问题进行了形式化描述。
