Yet wireless communications in these areas are advancing rapidly at a time when the mobile-phone industry is approaching saturation point in rich countries and the average revenue per user is sagging.
然而，当移动电话产业在发达国家一度接近饱和，而且从每位用户取得的收入开始下跌的时候，无线通讯在这些地区依然飞速发展。
Yet wireless communications in these areas are advancing rapidly at a time when the mobile-phone industry is approaching saturation point in rich countries and the average revenue per user is sagging.
然而，当移动电话产业在发达国家一度接近饱和，而且从每位用户取得的收入开始下跌的时候，无线通讯在这些地区依然飞速发展。
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