为了增加覆盖率，除了陆上电话局抽取的样本外，调查者还随意拨打了一些手机号，并把两种样本结合起来统计。

To increase coverage, this land-line sample was supplemented by respondents reached through random dialing of cellphone numbers. The two samples were then combined.

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结合物的细胞核基因是人类的，但是一小部分其它基因（位于细胞核外的称为线粒体的组织里面）来自兔子的遗传。

The nuclear genes of the result would be human, but a handful of other genes, which inhabit structures outside the nucleus, called mitochondria, would be inherited from the rabbit.

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全部主键和外键均定义了索引，来支持12个表之间有效的结合。

Indexes are defined on all primary and foreign key columns to support efficient joins between the 12 tables.

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Because bacteria are outside of cells and when antibodies bind to them they can neutralize them.

因为细菌生存在细胞外,抗体结合细菌并中和掉它们

耶鲁公开课 - 生物医学工程探索课程节选