问题描述：
英语改述句子,改述句子中带括号的词组.
1、And we can (expound on) why like them.
2、We now have eco-literature,prose poetry,studies in pop culture,rhetoric and composition and postcolonial literature of travel,which（has no overlap with)colonial American travel literatuer.
3/At some universities today,an undergrduate can matriculate without (cracking the spine of a novel),let alone a book of poetry.
4/(It comes as a surprues to many people) to discover that nutrition is a relatively new science.
5/During the Second World War the addition ofextra calcium and some vitamins to flour (became compulsory).
1、And we can (expound on) why like them.
2、We now have eco-literature,prose poetry,studies in pop culture,rhetoric and composition and postcolonial literature of travel,which（has no overlap with)colonial American travel literatuer.
3/At some universities today,an undergrduate can matriculate without (cracking the spine of a novel),let alone a book of poetry.
4/(It comes as a surprues to many people) to discover that nutrition is a relatively new science.
5/During the Second World War the addition ofextra calcium and some vitamins to flour (became compulsory).
问题解答：
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