Firms which render payment services have to comply with many regulations, including licensing and supervision rules, which now the EC apparently also intends to apply to digital currency exchanges.
公司提供支付服务必须遵守很多规定，包括许可和监管规则，目前欧盟显然还打算适用于数字货币交流。
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The living modes and thinking modes alter with the development of society, the market of guarding industry in which supervision and digital service is the technical base will be booming.
Through the introduction of Digital Video supervision system in Metro system, the paper analyzes some existing problems and gives corresponding solutions.