Victoria: Safe flight.

维多利亚： 祝你们一路平安。

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The airline did provide a safe flight for its passengers.

这航空公司为乘客提供安全的飞行旅程。

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The orientation of the minimal safe flight height is researched.

提出了最小安全飞行高度的有向性问题。

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Shuttleworth: We're just starting to see the first private vehicles being certified as safe for flight, carrying passengers to the edge of space and back.

CNN: Next challenge for space industry

On April 21st the CAA established a new rule, deeming regions thought to have less than 2, 000 micrograms of dust per cubic metre safe for flight.

ECONOMIST: Volcanoes and air travel: Small eruption in Iceland | The

The two events have raised questions about why the FAA and Boeing didn't uncover problems with the batteries before the FAA certified the plane as safe for flight in 2011.

NPR: FAA Approves Resumption Of Boeing 787 Flights