For those of you who aren't familiar with this, we split up the user base by what school they go to and we make it so that people at a given school can only see the profiles and contact information of people at their school.

对此有些人可能不大了解，我们以学校为标准将用户分组,只有在同一所学校的学生,才能够相互浏览,个人资料和联系方式。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Romney says that a combination of economic growth and base broadening would make up that revenue loss.

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And she needs to make converts not just shore up the base if she is serious about becoming president.

BBC: Republican fireworks seek to catch attention

The genome project, which the government began in 1987, aimed to speed the gene-hunting effort by providing the first full map of all 3 billion base pairs that make up human DNA. (It was not necessary, in this effort, to run through all the pairs on each set of chromosomes, or 6 billion pairs.) And because the base pairs come in only four varieties, they are digital and ideal for computer decoding.

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