To ascertain its being a fact, rather than purely imaginary, you can travel to Washington, D. C., and there see the White House with your own eyes.

以白宫为例，为了确定它的存在是一项事实，与其空想，不如到华盛顿特区去一趟，在那儿你亲眼看看白宫。

In modern legal system, by encouraging the co-operation of fact-finder and parties, it provides the possibility to ascertain the truth.

现代诉讼制度通过强调裁判者与双方当事人的共同参与，为查明事实真相提供了制度前提和可能。

I was conscious of my ignorance, and if Mrs. Strickland was a well-known writer I thought it as well to ascertain the fact before I spoke to her.

我知道自己孤陋寡闻，如果思特里克·兰德太太是是一位名作家，我在同她谈话以前最好还是把情况说清楚为好。