... underarm （侧泳）下臂 under-distance repeats 短于主项距离的反复练习 under-distance swimming 短于主项距离的游泳训练法 ...
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I recommend building up to it with medium-distance track intervals 200 to 800 meter repeats.
我建议是在进行了场地200 - 800米间歇跑的基础上再进行。
Communicating long-distance can also feel a bit like the children’s game of “telephone, ” where each child in a circle repeats a message to the next child in the circle in a whisper.
进行远距离沟通也有点像在玩小孩子玩的传声筒游戏，孩子们围成一个圈，通过耳语把信息在圈子里面流转。
When measuring by distance on a track, I've always found that 200 meters is a good length for speed repeats.
若以跑道距离计，我发现200米比较适合速度-跑姿重复跑。
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