What about actual productivity measured in ton-miles?

什么是实际生产力衡量吨级哩呢？

youdao

Rail’s share of the freight market, measured in ton-miles, has risen steadily to 43%—about the highest in any rich country.

铁路在货运市场上的份额，以英里吨数计算，稳步上升到43%——与任何富裕的国家相比都处于最高水平。

youdao

Rail's share of the freight market, measured in ton-miles, has risen steadily to 43%-about the highest in any rich country.

铁路在货运市场上的份额，以英里吨数计算，稳步上升到43%——与任何富裕的国家相比都处于最高水平。

youdao

But demand for ocean transport of crude (measured in ton-miles) is expected to rise only 4%.

FORBES: Magazine Article

As measured by ton-miles, trucks controlled 32% of the nation's freight in 2002, the most recent year statistics are available, while trains delivered 28%.

FORBES: Magazine Article

The average train has an efficiency of 400 ton-miles per gallon of fuel, compared with 200-300 tons for trucks, according to the Rocky Road Mountain Institute.

FORBES: With Economy Chugging Along, Rail Stocks Seen As Best Transport To Higher Gains