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。
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.
在可行的地方有一些海水淡化厂,但它们的运营成本很高,并且需要经常维修。
Some desalination plants exist where feasible, but they are costly to run and can need constant repair.
在很高的地方我能看到一个机器人正在工作。
应用推荐