He said that aviation service providers plan to arrange 137,000 flights, or about 17,000 flights per day, during the holiday.

他说，航空服务提供商计划在假期期间安排13.7万个航班，即每天约1.7万个航班。

So these are things like aviation services and systems and commercial and military engines.

所以这些就是航空服务和系统以及商业和军用发动机。

The overhaul covers all regional air-traffic management bureaus, companies involved in civil aviation transport and general aviation, service providers, airport operators and flight training organizations, among other sectors.

此次安全大检查的范围包括各地区空管局、运输（通用）航空公司、服务保障公司、机场公司、飞行训练机构等。