沿着大运河的东段本该最先完成，但是已经重度工业化的沿岸地区污染过于严重，水处理所需的开支令人望而却步。
The eastern leg, along the Grand canal, was supposed to be easiest to finish, but pollution in this heavily industrialised region is so great that water treatment is prohibitively expensive.
哥本哈根峰会本该是讨论完成有关全球变暖协议的大会。
The Copenhagen summit was originally supposed to be the deal to end all deals on global warming.
当你回顾你自己更为久远的过去时，你更倾向于看到那些你本该去做或本应该完成的事。
When you look back at your own past to long ago, you are more likely to see things you should have or could have done.
卢梭说：“我如果真要完成这样一个标题的集子，那我本该在六十年前就着手了。”
Rousseau said, "If I really need to complete this collection with a title like this, then I should originally commence sixty years ago."
卢梭说：“我如果真要完成这样一个标题的集子，那我本该在六十年前就着手了。”
Rousseau said, "If I really need to complete this collection with a title like this, then I should originally commence sixty years ago."
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