Once Polish air space was entered, the Polish aviationauthority would secretly shepherd the flight, leaving no public documentation.

飞机一旦进入波兰领空，波兰民航当局会秘密的引导航班，不留下任何公共记录。

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We refocused our view to accelerate documentation of the broad-leaved flora, and the Dendrological Documentation Project (DDP) took flight in 1976.

因此我们重新把工作重点放到加快阔叶植物的整理归档上来，这样在1976年树木整理归档项目（DDP）就正式启程了。

youdao

In this past quarter, Chinese airline EVA has also deployed iPad for pilots and crew for flight manuals, documentation and training.

FORBES: Apple Surges in Corporate Market with iPhone, iPad, and Mac

Applicants for experimental permits will need to provide a description of their program, a flight test plan, documentation showing the operational safety of the spacecraft and a plan for response in case of a mishap.

FORBES: Magazine Article

Once Polish air space was entered, the Polish aviation authority would secretly shepherd the flight, leaving no public documentation.

NEWYORKER: The Black Sites