A very helpful tool to define this dimension is a service classification system.
要定义这个维度，一个非常有用的工具是一个服务分类系统。
2
The ability to watch and count system calls is helpful not only for troubleshooting, but also for understanding how application configuration affects performance.
监视和统计系统调用的功能不仅有助于进行故障排除，还有助于理解应用程序配置如何对性能产生影响。
3
If children are naturally helpful and sociable, what system of child-rearing best takes advantage of this surprising propensity?