Using this system, preferential treatment's given to 'premium' visitors.
高级访问者们使用该系统会获得优惠待遇。
2
Preferential development of urban public transportation system is a universally accepted approach of solving urban traffic problem.
优先发展城市公共交通系统是解决大、中城市交通问题的最佳途径。
3
Methods: The historical background formed American Orphan Drug system, regulation of Orphan Drug system, preferential measure, and FDA s approval procedure are stated.