per mile

基本解释

On Sundays, he runs 15 miles at a pace that's 30 seconds per mile slower than his marathon race pace.
在星期天，他用每英里30秒的速度一次跑15英里，这个速度比他的马拉松比赛速度要慢。
Compared with the other brands, this kind of type costs less per mile and wears much longer due to its topnotch rubber.
与其它牌子相比，这种轮胎每英里损耗较少，也耐磨一些，因为它是用一种流橡胶做成的。
In the last third of your run, drop the pace by 20 to 30 seconds per mile. Concentrate on holding good form, which will help you stay relaxed as you push the pace.
在你长距离跑的最后三分之一，将你的配速每英里提高20~30秒，注意保持最好的姿势，这样能帮助你在提速的过程中保持放松。

"There's as many as 4,100 adult silver carp per mile here on the middle Illinois River."
"So they very quickly turn into about 13 tons per mile, and when you look at an eighty mile reach, it's phenomenal how much bio mass is taken up by these Asian Carp."
"At a per-passenger-mile basis, rail is about three times as efficient as travel by car, in terms of fuel efficiency, and six times as efficient as travel by air, so there are pretty substantial pollution reduction benefits both in terms of greenhouse gases and other pollutants."

The medical and moving rate is also up 1 cent per mile from the 2012 rate.
FORBES: 2013 IRS Mileage Rate Increases To 56.5 Cents Per Mile