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Most of them travel 40,000 miles to a satellite and then back to earth. Ten years ago, a satellite was capable of receiving and transmitting more than 33,000 telephone conversations simultaneously. No
自考英语（一）78讲
U.S. President Donald Trump (R) speaks before signing a decision memo and a letter to members of Congress outlining a plan for privatizing the nation's air traffic control system, in the East Room of the White House, in Washington DC, on June 5, 2017
2017CRI中国国际广播电台
Snowstorm disrupts air traffic, affects 12,000 in NW China
英语新闻
KELLY MCEVERS, HOST: The White House announced a plan today to privatize the U.S. air traffic control system. This is part of the administration's focus this week on the country's aging infrastructure. President Trump says the FAA has been trying to
2017年NPR美国国家公共电台6月
Air China has become the nation's first domestic carrier to take the exciting step of offering customers in-flight WiFi internet. Passengers on board a recent Beijing to Chengdu flight have become the first customers to surf the net. CRI's Xie Zhao R
世界各地新闻集锦
Beijing is to establish an air emergency medical service network by the end of the year. As well as that Beijing Red Cross 999 Emergency Center is planning to launch the first air rescue insurance by year end. It is hoped it will help cut service exp
世界各地新闻集锦