城市的基础设施建设包括水电供应和公共交通系统。

The city's ___infrastructure includes water supply, electricity, and public transportation systems.

这个城市正在升级其数字基础设施以提高网络速度。

The city is upgrading its digital ___infrastructure to improve internet speed.

这个城市的交通基础设施需要升级以缓解拥堵问题。

The city's transportation ___infrastructure needs upgrading to ease traffic congestion.