maintenance charges的用法和样例：
例句
- Open standards are being embraced by enterprises as a means to drive down high integration and maintenance costs.
开放式标准被企业用作降低高整合及维护费用的主要手段。 - Increasing loading of equipment, decreasing maintenance expenditures and postponement of investments are goals to reduce life cycle costs.
增加设备的负荷，降低维护费用以及延缓投资都是降低使用寿命成本的目的。
