Its sail-like first dorsal fin provides stability while swimming.

帆状的第一背鳍在游动时提供了稳定性。

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Inside the box, the scientists created a trail with their artificial fish, which was essentially a rubber fin on a stick that created a trail similar to the swimming motion of a real fish.

在那个盒子里，科学家用假鱼设计了游动轨迹，基本上，那是由橡胶鱼鳍形成的，和真正的鱼游轨迹十分相似。

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Gungans have strong leg muscles for swimming, and are aided by their long fin-like ears.

冈根人腿肌强健，擅于游泳，一对长长的鳍状耳朵也有助于在水中运动。

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"You paddle out every morning and a sea turtle might be swimming around, birds diving around you, you might even see a shark fin or dolphins and you realize you're just one citizen among all these other species.

VOA: standard.2010.08.04

The star of the show is a whole rouget, served dorsal fin upward as if the fish were still swimming.

NEWYORKER: Rouge et Blanc