每分钟行数：排字速度或行印机速度的标准计算法。
Lines per minute (LPM) : a standard measurement of typesetting speed or line printer speed.
鸽子飞行数百英里，平均速度每分钟一英里，信息就放在小胶囊里绑在它们的腿上。
The pigeons flew hundreds of miles, averaging speeds of a mile a minute, with messages strapped to their legs in tiny capsules.
如果你每分钟步行数少于100，那么设法逐渐加快速度。
If you cover fewer than 100 steps a minute, think about gradually trying to pick up your pace.
如果你每分钟步行数少于100，那么设法逐渐加快速度。
If you cover fewer than 100 steps a minute, think about gradually trying to pick up your pace.
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