dorsals
plural of dorsal
(mining, dialect) the clay or slime washed from tin ore in dressing
(photography) A photograph taken from an aircraft, or by a drone remotely controlled from the ground.
(mineralogy) A manganese arsenate hydroxide mineral.
潜水中、研究者たちは数種の礁の魚の背びれを測定し、それが機動性に果たす役割を調べた。
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