Improvements in road construction and sailing had occurred, but shipping heavy freight over land remained expensive, even with the use of rivers and canals wherever possible.

道路设施以及航海技术都有所改进，但是即使在可以利用河流和运河的地方，船运重型货物到陆地的费用仍然很高。

youdao

As most of the world's mills are elsewhere, American cotton faces heavy freight charges.

因为世界上的工厂大多是在其它地方，所以美国棉花产业面临着运费沉重的问题。

youdao

The slow wagons of that time, usually drawn by horses, were too expensive for moving heavy freight very far.

那个时期的车厢通常是马拉的，很慢，把货物运送到遥远的地区要花很多的钱。

youdao

Constantly seeing powerful locomotives and precise signalling mechanisms, listening to the roar from the engines of heavy freight trains, the switchman felt that his reason had triumphed, as if he, too, were to blame for all this universal technological power and its charm.

NEWYORKER: Among Animals and Plants

Pharmaceutical companies are heavy users of air freight, but said they had enough stocks to avoid any problems in the short term.

BBC: An empty checkout desk at Belfast International airport

The accident, in January 2012, involved a freight train carrying heavy car components.

BBC: Reading West train derailment caused by poor packing