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China's domestically-produced navigation system aims to take 70-to-80-percent of the now GPS-dominated domestic market by 2020.
目前中国国内市场以GPS（全球卫星定位系统）为主，而国产导航系统旨在2020年前在国内市场占有70%-80%的份额。
A spokesman for the BeiDou Navigation Satellite System says the system will hold 15 to 20 percent of the market share by 2015.
北斗卫星导航系统的一位发言人表示，该系统在2015年前将占有15%-20%的市场份额。
Ran Chengqi also announced that the BeiDou system began providing positioning, navigation, timing and short message services to civilian users in China and surrounding areas in the Asia-Pacific region on Thursday.
发言人冉承其宣布，北斗卫星导航系统从周四开始提供定位、导航、授时和短报文信息服务，覆盖中国民间用户及周边地区在内的亚太大部分地区。
China launched the first satellite for the BeiDou system in 2000, and a preliminary version of the system has been used in traffic control, weather forecasting and disaster relief on a trial basis since 2003.
中国于2000年发射了第一颗北斗导航卫星，北斗卫星的初级系统于2003年试用，应用于交通管制、天气预报和灾难救援等。
South Korea has formally submitted a claim to an extended portion of the continental shelf in the East China Sea to the United Nations.
韩国正式向联合国提交了东海大陆架划界扩充案。
The report says the outer limit of the country's continental shelf extends to the Okinawa Trough.
在该文件中阐明韩国的大陆架界线自然延伸至冲绳海槽。
South Korea's foreign ministry says the final decision on the demarcation will be made through consultations with China and Japan, which have different claims.
韩国外交部表示，中国和日本对相关海域的界线确定持不同意见，最终划界将通过当事国的谈判来决定。
