a shark's dorsal fin

鲨鱼的背鳍

《牛津高阶英汉双解词典》

His dorsal fin was down and his huge pectorals were spread wide.

它的脊鳍朝下耷拉着,巨大的胸鳍大张着.

英汉文学 - 老人与海

A goldfish LanChou belongs to the egg, dorsal fin.

兰畴属于蛋种金鱼, 无背鳍.

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The shark's dorsal fin was cut off by the fisherman.

鲨鱼的背鳍被渔夫割了下来.

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The dorsal fin is ornamented with these two colours.

空气垂直舵由这两色装饰.

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The dorsal fin is spinous.

背鳍有很多刺.

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