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单词 轻于空气
例句 DEFINITIVE EXAMPLES 权威例句〔aeronaut〕A pilot or navigator of a lighter-than-air craft, such as a balloon.飞船驾驶员,气球驾驶员:轻于空气的航空器,例如气球的驾驶员或导航员美国传统〔experiment〕He experimented with lighter-than-air flight.他试验了轻于空气的飞行。朗文当代〔lighter-than-air〕Having a weight less than that of the air displaced. Used of certain aircraft.轻于空气的:重量比周围的空气轻。用于某种航空器美国传统
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