出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/06/09 17:42 UTC 版)
An airship or dirigible is a type of aerostat or "lighter-than-air aircraft" that can be steered and propelled through the air using rudders and propellers or other thrust mechanisms. Unlike aerodynamic aircraft such as fixed-wing aircraft and helicopters, which produce lift by moving a wing through the air, aerostatic aircraft stay aloft by having a large "envelope" filled with a gas which is less dense than the surrounding atmosphere. In the past hydrogen was generally used, but nowadays helium is preferred because of its lack of flammability.
an airship
an air-fleet
飛行船で.
by airship
a ship
carrier-based planes
a rowboat
the fly-trap
an airship
an air-fleet
a ship
carrier-based planes
a rowboat
客船.
名詞の変化形:
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