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the height above sea level, measured under standard conditions, at which the rate of climb of an aircraft has fallen to a specified amount 实用升限
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absolute ceiling
In an adjoining room, a file on Mr. Mehiri, bound in a green folder marked with the name of Libya's internal-security service, lay amid scores of others stacked in floor-to-ceiling shelves.
Why are we so quick to point our finger at the men around us for the glass ceiling when a lot of us are not doing ourselves the service of crashing through it?