在美国、欧洲和日本等发达地区，无线互联网已实现城市高密度覆盖。
In most advanced areas such as United States, Europe and Japan, city wireless network coverage has reached a high density.
在美国、欧洲和日本等发达地区，无线互联网已实现城市高密度覆盖。
In most advanced areas such as United States, Europe and Japan, city wireless network coverage has reached a high density.
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