The keels, finlets, and corselet help direct the flow of water over the body surface in such as way as to reduce resistance (see the figure).

龙骨，小鳍和盔甲帮助引导水流流过身体表面，他们用这种方式来降低水的阻力（看图示）。

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The keels, finlets, and corselet help direct the flow of water over the body surface in such as way as to reduce resistance (see the figure).

龙骨，小鳍和盔甲帮助引导水流流过身体表面，他们用这种方式来降低水的阻力（看图示）。

youdao