Breaststroke is the slowest of the four official styles in competitive swimming, but it is commonly agreed that it is by far the most difficult to do correctly.

蛙泳是竞技游泳的四种标准泳姿中最慢的一种，但它却是公认最难做得标准的一种。

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After he retires from swimming, Michael Phelps might want to try his hand at competitive eating.

从游泳队退役之后，迈克尔·菲尔普斯也许会去参加食量比拼大赛。

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Mass involvement tends to favor sports such as swimming and aerobics, and tends to stress the competitive aspects less than men do.

大众参与的运动多是备受青睐的，如游泳和体操，而且不像男性运动那样强调竞技性。

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After dominating the swim lanes for four Olympics, Phelps retired from competitive swimming.

FORBES: U.S. Olympic Committee Names Phelps And Felix Athletes Of The Year

Although this represented just a 2% improvement, Dr. Karageorghis says it's enough to make a difference in the realm of competitive swimming.

WSJ: Optimal Music for the Gym

The goals of dog-swimming lessons are more remedial and therapeutic than competitive.

WSJ: See Spot Swim: Remedial Lessons Put Pooches in the Pool