这家化工厂安装了分布式控制系统来优化生产流程。

The chemical plant installed a ___DCS to optimize its production processes.

为了保护领空安全，他们部署了先进的防空系统。

To safeguard their airspace, they deployed an advanced ___DCS.

这款手机支持DCS网络，因此信号质量更好。

This phone supports ___DCS networks, so it has better signal quality.