translation.en: This second cliff, the introduction of gutters on the side of the pool that allows water to splash off, rather than becoming turbulence This final cliff, the introduction of full-body and low-friction swimsuits.
translation.zh: 第二个陡坡，是游泳池边 排水沟的普及， 这允许水随意溅出， 而不是变成在比赛时阻碍运动员 的涡流。 最后一个陡坡， 是全身式低摩擦力泳衣 的普及。