One possibility is that it has something to do with how our brains process information, she adds, but "we cannot be very certain about it."
她补充说，一种可能性是此阶段可能与我们大脑如何加工信息有关。但是“我们对此不能十分确定。
Kids who have certain bacterial infections can be very compulsive about touching their mouths, which helps the spread.
有些孩子感染某种细菌之后会强迫性的触碰他们的嘴，这有助于细菌传播。
There may very well be a great shortage of labor of certain kinds, with no prospect of any shifting or adapting which will bring about an increased supply.
某些种类的劳动力很可能会大量短缺——我们对经过转移或适应而带来劳动力的增加实在不抱希望。
Helen Wallace, of GeneWatch UK, told The Times: "Your DNA contains very personal information about you, and in the longer term we can't be certain this won't be used by insurance companies.
海伦·华莱士，英国基因观察和绿色和平网站成员，向泰晤士报吐露：“你的DNA包含了关于你自己的全部个人信息，长远来说我们不能确定这会由保险公司使用。
Be very careful about what is written. Make absolutely certain that written translations are accurate and cannot be misinterpreted.
一定要注意书面内容，绝对保证书面翻译是准确的，不知被引起误解。
Be very careful about what is written. Make absolutely certain that written translations are accurate and cannot be misinterpreted.
一定要注意书面内容，绝对保证书面翻译是准确的，不知被引起误解。
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