A new way of copper tailings' comprehensive utilization is studied, i. e. use copper tailings to make colour sand, which can be used in buildings as decorated materials.

研究了铜尾矿资源综合利用的新途径，利用铜尾矿研制彩色石英砂，使其成为一种装饰材料应用于建筑工业。

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Many people use E-mail,blogs,text messages and social Web sites like Facebook to keep in touch with their friends.

VOA: special.2009.02.06

I will use that to post information, maybe once in a while send an e-mail to the whole class.

我会在那上面发布通知,可能隔一段时间就会给全班群发一封邮件

耶鲁公开课 - 基础物理课程节选

And while I'm at school in class, I can use the e-books of the courses that I'm studying.

在学校上课的时候，我也可以使用那些我修的课程的电子材料。

What kind of实战 - SpeakingMax英语口语达人

R. 2164, would mandate that all companies use an electronic employment verification system known as E-Verify when hiring new employees or, under a complicated set of rules, sometimes use E-Verify for existing employees.

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It's also secured a partnership with E Ink to use the latest in ruggedized e-paper technology and is hoping to raise enough funds to make Popslate a reality.

ENGADGET: Popslate launches iPhone 5 case with four-inch E Ink screen (video)

The bill would expose business owners to the genuine risk of losing their livelihoods because of a failure to follow government-mandated procedures, including under what circumstance to use E-Verify (only about 3 percent of employers now use the system).

FORBES: Only Takes 2,000 (or 3,000) Pages to Explain U.S. Immigration Rules