Some Americans wonder if it is worthwhile to spend several years for a dissertation which in many cases just collects dust on the library shelf.
也有老美怀疑是否值得花上数年时间写博士论文，那些论文在许多情况下，只放在图书馆书架上累积灰尘。
The students at Hogwarts spend a lot of time in the library doing research for their assignments, often using ancient and scholarly books of magic theory.
在霍格·沃茨的学生在图书馆里花费大量的时间为做好他们的作业而进行研究。
The students at Hogwarts spend a lot of time in the library doing research for their assignments, often using ancient and scholarly books of magic theory.
在霍格·沃茨的学生在图书馆里花费大量的时间为做好他们的作业而进行研究。
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