I was up till 3 this morning, writing a paper for my literature class.

我熬夜到今天早上3点，写文学课的论文。

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We were writing a paper together.

我们正在一起写论文。

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He is said to be writing a paper on this subject.

据说他正在写一篇关于这个主题的论文。

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Writing a term paper, research paper or essay for a college class is a kind of academic writing.

VOA: special.2009.04.30

I am now writing a paper with two other people.

我现在就在和另外两个人一起写论文

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I should have started writing this paper a long time ago.

我早该开始写这篇论文。

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Dr Minor and his colleagues are currently writing a scientific paper on the man, set for publication in a medical journal later this year.

BBC: Silent polio carrier highlights risk

Instead of writing out a paper check or using a plastic card, the customer beams the instructions from his or her personal information appliance, which will hasten the transaction process, IrDA said.

CNN: Infrared payment could replace credit and debit cards

Its storage potential is enormous: Dr Sheats says that initially, a single layer of memory the size of a sheet of writing paper will be able to store one billion bytes (a gigabyte) of data.

ECONOMIST: Just press print