The parallel elevated road is mainly suitable for the suburban of the big cities, and the subway is mainly suitable for the main city area of the big cities.
并联高架路主要适用于大城市的郊区，地铁主要适用于大城市的主城区。
The parallel elevated road is mainly suitable for the suburban of the big cities, and the subway is mainly suitable for the main city area of the big cities.
并联高架路主要适用于大城市的郊区，地铁主要适用于大城市的主城区。
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