Jefferson believed that a free man obtains knowledge from many sources besides books and that personal investigation is important.

杰弗逊认为，一个自由的人获得知识的方法除了阅读书籍外，还有很多的来源，其中，个人调查是非常重要的。

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Jefferson believed that a free man obtains knowledge from many sources besides books and that personal investigation is important.

杰弗逊认为：一个自由人除了书本之外还可从其他地方获取知识，而且个人调查研究也很重要。

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Hadmy uncle referred to these cases by name instead of merely by number, Ishould have attempted some corroboration and personal investigation;but as it was, I succeeded in tracing down only a few.

如果我叔祖父提到这个人的时候不是用数字做代号而是直接记录名字的话，那我可能会亲自拜访；但即便如此，我还是跟踪了几个案例。

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At the center of the investigation is Michael Jackson's personal physician, Doc.Conrad Murray, who has yet to be charged with a crime.

VOA: standard.2009.12.25

To restore public confidence, an investigation into personal trading activities of all investment staff should be undertaken immediately and the results made public.

FORBES

Corruption, criminal investigation, personal security and the financing of politics are issues that trouble many Latin Americans, as they struggle to make their democracies work more effectively.

ECONOMIST: Argentina: Death and corruption | The

Meanwhile, the IRS had initiated another investigation of Personal Tax after discovering that in 2011, 99.5% of the 1, 762 tax returns filed by Personal Tax claimed refunds of which over half were claims of self-employment income for alleged in-home childcare providers or beauticians.

FORBES: Some People Can't Resist The Siren Call Of Tax Season