中国是全世界网络用户最多、增长最快的国家，同时也拥有全球最大的移动设备用户群，因此必须严肃对待这个问题。
With the largest and fastest growing Internet user population in the world, complemented by the largest mobile device user base in the world, China needs to take this problem very seriously.
四堡群是华南最古老的地层单位，赋含丰富的矿产，是解决中国南方很多重大基础地质问题的关键所在。
The Sibu Group yeilded abundant mineral resources is one of the earliest stratigraphic units in South China. It is key to research a series of fundamental geological problems in South China.
四堡群是华南最古老的地层单位，赋含丰富的矿产，是解决中国南方很多重大基础地质问题的关键所在。
The Sibu Group yeilded abundant mineral resources is one of the earliest stratigraphic units in South China. It is key to research a series of fundamental geological problems in South China.
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