light·er-than-air 
(lītər-thən-âr)
(lītər-thən-âr)adj.
Having a weight less than that of the air displaced. Used of certain aircraft such as balloons and dirigibles.
| 单词 | lighter-than-air |
| 释义 | light·er-than-air (lītər-thən-âr)adj. Having a weight less than that of the air displaced. Used of certain aircraft such as balloons and dirigibles. |
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