联邦铁路局会继续提升安全级别并促进新高铁运行方案的引进。
FRA will continue to promote safety and facilitate the introduction of new HSR operations.
专家称，中国必须提升网络安全级别。
昨日起中国民航提升机场安全级别。
China's civil aviation authority yesterday raised security levels at airports.
昨日起中国民航提升机场安全级别。
China's civil aviation authority yesterday raised security levels at airports.
应用推荐