游码是天平、台秤等的最小的砝码，但用法与其余的砝码不同，它可以在秤的横梁上移动位置（所以叫游码），直到平衡，以确定被称物体的质量的最小一位的值。这最小一位值的具体单位取决于衡器的种类（灵敏度）。
n. rider
misc. sliding poise
每游大概500码，他就会抬头看看自己的进展。
Every 500 yards or so, he raised his head to judge his progress.
可能你泳游的挺好，可是穿着飞行服、救生背心，头戴钢盔，脚蹬铁头靴子，那就完全不是一码事了。
"You may swim well, but put on a flight suit, a survival vest, a helmet and steel-toed boots, and it's a whole different ballgame," Gayles says.
我经常看到泳者练习他们的划手滑行长度，有些是让人印象深刻的低划数游泳（譬如说划手12次游25码）但是非常没有效率的游泳技巧。
I've often seen swimmers who have been working on their Stroke Length, swimming with an impressively low SPL – let's say 12 strokes for 25 yards – but a thoroughly inefficient style.
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