Overhead tasks such as database setup and user interface design require no small set of skills.
开销（overhead）任务，如数据库设置和用户界面设计，需要不少的技巧集。
2
This article first demonstrates the overhead incurred in the traditional polling mechanisms, and shows how the pollset interface improves the performance and scalability.
本文先讨论传统poll机制的开销，说明pollset接口如何改进性能。
3
If your system spends most of its time serving up Web applications, then you can turn off the overhead of the graphical interface and use that memory and CPU for your service.