蛙泳中腿部蹬水的动作很可能是模仿青蛙的泳姿而来。

The leg action of the breaststroke may have originated by imitating the swimming action of frogs .

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当它们迅速摆腿，它们把展开的脚用力蹬水，如果保持了速度，那么所产生的小气涡能让它们不沉入水里。

As they rapidly churn their legs, they slap their splayed feet hard against the water, creating a tiny air pocket that keeps them from sinking, provided they maintain their speed.

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“过来，青蛙！”埃弗里叫着，去水中捞他的青蛙。青蛙又踢又蹬，把肥皂水溅到浆果馅饼上面。

"Come on, frog!" cried Avery. He scooped up his frog. The fog kicked, splashing soapy water onto the blueberry pie.

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