(a) the direction of flight by birds, esp. during migration; (b) Aeronautics (see quot. 1956).
单词 | θ38463 |
释义 | the world > animals > birds > flight > [noun] > direction of (1) flight-line1933 (a) the direction of flight by birds, esp. during migration; (b) Aeronautics (see quot. 1956). |
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