Description: Remember the excitement as you watched the coverage of those early NASA achievements in the great Space Race?
说明：请记住你的兴奋观看了这些早期美国宇航局在太空竞赛的伟大成就的报道？
Ironically, as mobile operators race to upgrade their 3g networks to offer wider coverage and higher transmission speeds, they also increase their vulnerability to VoIP.
讽刺的是，现在的移动运营商却在为升级他们的3g网络扩大覆盖面和提高传输速度上彼此竞争，这也正使得他们的弱点越来越多的暴露给网络语音技术。
Ironically, as mobile operators race to upgrade their 3g networks to offer wider coverage and higher transmission speeds, they also increase their vulnerability to VoIP.
讽刺的是，现在的移动运营商却在为升级他们的3g网络扩大覆盖面和提高传输速度上彼此竞争，这也正使得他们的弱点越来越多的暴露给网络语音技术。
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