ton-mile

名词 n.
中文释义

英文释义

名词 n.
  1. A unit of measure expressed in number of short tons moved over a specific distance in miles.
    — In the short series of chapters which is here begun, an attempt will be made to set down and illustrate some of the main principles governing the transportation of freight by railroads in the United States. The primary object is to convey a clear idea of what is meant by the "Ton-mile," the "Train-mile," the "Unit of service," the "Unit of product," and the various other words and phrases commonly used to designate the main facts and things in the Railroad industry.

词形变化

ton-miles plural ton mile alternative

词源

Compound of ton + mile, although, as with any such unit of measure (e.g., person-months, newton metres), the mathematical relationship of multiplication is simultaneously involved: X tons transported a distance of Y miles = X × Y = Z ton-miles. Attested since the 19th century in railway logistical usage; greatly increased in use by the logistics boom of World War II and the continued postwar development of advanced logistics.
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