Because every airport offers a potential entry point into the global system, every nation faces the threat from gaps in aviation security throughout the world.

因为每一个机场都存在一扇可能通往国际航空系统的大门，而一国安检的疏漏也会影响到他国的安全。

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"User charges" means a charge imposed on airlines for the provision of airport, air navigation, or aviation security facilities or services including related services and facilities.

“使用费”，指提供机场、空中导航或航空保安设施或服务，包括相关服务和设施，而向空运企业收取的费用。

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The officer worked at the police aviation security unit of the airport at the Namibian capital Windhoek.

这位官员在纳米比亚首都Windhoek机场航空安全警察部门工作。

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The thieves appeared to have detailed information about both the cargo and operations at Brussels Airport, said aviation security specialists, and likely had help from people at the airport.

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Delta Flight 126 took off about 8 p.m. and returned to the airport about 90 minutes later, according to a source familiar with aviation security at the airport.

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Securicor Aviation, Cardiff airport's security contractors, delivered up-beat figures with a turnover rising to 10% over the previous year.

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