General attributive (chiefly in sense 3), as proving flight, proving machine, etc.
| 单词 | θ208176 |
| 释义 | society > travel > air or space travel > [noun] > a flight through air or space > to test aircraft (3) proving flight1573 General attributive (chiefly in sense 3), as proving flight, proving machine, etc. test flight1912 a flight during which the performance of an aircraft is tested. shake-down flight1939 |
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