All the paper has been used.

所有的纸张都用完了。

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The system designed in the paper has been used in the subject for National WEST development-han River Navigation Safety Information system, supported by the Ministry of Communications of China.

本设计的成果已经作为交通部西部科研课题-汉江航行安全保障综合信息系统的一部分进行研究开发的。

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If the toilet paper has been used up, buy some more!

如果卫生纸用完了，再买一些！

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The method used to attach the polyethylenimines to materials is also well known the bonding agent benzophenone has already been used to attach the anti-microbial agent to glass, polymer, paper, and metal.

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