英语语法分析

The invention of central heating is often credited to the ancient Romans, who installed a system of air ducts called "hypocaust" in the walls and floors of public baths and private villas.

集中供热的发明要归功于古罗马。他们在公共浴池和私人别墅的墙内和地板内安装所谓火炕的风道系统。