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

蛙泳的腿部动作可能是模仿青蛙的游泳动作而来。

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Then you can help her with the breaststroke and sidestroke.

那在蛙泳和侧泳方面，你可以帮助她。

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Lewis: Yes. He can also teach you the freestyle and the breaststroke.

刘易斯：能。他还能教你自由式和蛙式。

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South Africa's Cameron van der Burgh put in the fastest 50m breaststroke time in the world this year, a Commonwealth Games record of 27.18 seconds, to win gold and complete a 50m-100m double.

BBC: Commonwealth Games: Three golds for English swimmers

Kirsty Balfour was in record-breaking form as she booked her place in Montreal with victory in the 100m breaststroke in a Scottish record time of one minute 08.66 secs.

BBC: SPORT | Other Sport | Swimming | Gibson earns place in Montreal

Ireland's Michael Williamson clocked 1:02.23 in the morning heats of the 100m breaststroke which was a personal best and he will look forward to joining Bree in Sunday's longer event.

BBC: SPORT | Northern Ireland | Bree unable to repeat heroics