bilateral breathing

基本解释

Similarly, many swimmers have attempted to learn bilateral breathing but have found it too hard and given up.
同樣，很多遊泳者曾企圖學會雙邊換氣，但卻發現它太難，然後放棄了。
On the third length, breathe every three strokes, with each hand-hit counting as one stroke. This is commonly called bilateral breathing.
第三個長度採用三劃一換氣，注意每衹手的劃水都算一劃。這樣的換氣方式就是通常說的雙側呼吸。
Fortunately after about 2 weeks things begin to get easier and bilateral breathing technique starts to require much less concentration and persistence.
幸運地是，大約2個星期後，事情開始變得更容易了，雙邊換氣技術開始對注意力集中和持久性要求更少了。