common service system

What is a little more common is some kind of IO operation, like accessing a Web service, or reading from the local file system.

XUL 应用程序中较为常见的是一些 IO 类的操作，如访问 Web 服务或是从本地文件系统读取。

As a round-the-clock working telecom product, it is more important to filter spams and discover the denial of service by recerving a mass of junk mails than common mail system.

相比较一般的邮件系统而言，作为一个需要全天候稳定运行的电信产品，对垃圾邮件过滤以及如何发现和预防由于垃圾邮件造成系统拒绝服务的要求显得更为迫切。

The onsite electric power system consists of the main generator, the unit station transformers, the common station service transformer, the diesel generators and the electric distribution system.

厂内配电系统由主发电机，主变压器，厂用变压器，柴油发电机和相关的配电设备组成。