四级This means that some wells may even need to undergo desalination after extraction, thus increasing the cost.
这意味着一些油井甚至需要在提取后进行脱盐,从而增加了成本。
2018年12月四级真题(第一套)阅读 Section C
四级Some desalination plants exist where feasible, but they are costly to run and can need constant repairs.
一些海水淡化厂在可行的情况下存在,但运行成本高,需要经常维修。
2018年12月四级真题(第一套)阅读 Section C
未经许可,严禁转发。QQ交流群:688169419