calm wind
(US, aviation) Wind that is slower than 3 knots.
(number theory) A prime number that becomes a different prime when its decimal digits (or digits in some specified other base) are reversed.
simple past tense and past participle of orthogonalize
A subdistrict of Yidu, Yichang, Hubei, China.
パイロットは着陸直前に風速3ノット未満の風を無線で報告した。
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