Aristotle advised investigators to make sure of the fac ts before seeking the explanation of the facts. 李贝.西洋科学史.
In originally committing himself to this line of investigation he was well aware that he was going in a direction diametrically opposite to that followed by previous investigators. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
He has made a plea, and sketched a plan which hundreds of investigators the world over must help to realize. 沃尔特·李普曼.政治序论.