本地交换运营商 ; 现有本地交换机运营商 ; 老牌的本地电话公司 ; 现有地区通信运营商
在业的本地交换运营公司
In the DOJ's opinion, an incumbent carrier would need to demonstrate both compelling evidence of capacity constraints and an efficient use of its current licenses in order to gain additional lower frequency spectrum.
ENGADGET
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。