[ 第三人称单数 breaststrokes 现在分词 breaststroking 过去式 breaststroked 过去分词 breaststroked ]
以上来源于: WordNet
N-UNCOUNT Breaststroke is a swimming stroke that you do lying on your front, moving your arms and legs horizontally in a circular motion. 蛙泳 [also 'the' N]
I do not yet know how to swim breaststroke effectively.
我还不知道如何有效地进行蛙泳。
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