巴黎的地铁系统非常便捷，几乎可以到达城市的任何地方。

The ___metro in Paris is so convenient that you can reach almost anywhere in the city.

这个房间大约有5米宽。

This room is about 5 ___meters wide.

大都市通常有更完善的公共交通系统。

___Metros usually have better public transportation systems.