Ok, three unknowns, but solving for aX+bY+cZ = d is too much to ask for in a swim drill metaphor.
It's called stone skipper, and the fact is, stone skipper is your friend as long as you resolve to not go too fast, not use your feet to kick, stretch your arms and keep them at the top of the water even if it does wear you out, and stop to breathe.
三个未知因素,好比解三元方程,对一个游泳练习的比喻来说好像太过分了
这个练习叫攀岩,实际上如果你不追求速度,不想打腿,不想让手臂入水后在水面附近让你感到疲劳的话,这个练习就是你的好朋友。 |