10. It is a plain thing, a very plain truth.
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a very plain truth
一个很明显的事实
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A truth must become not only plain but also commonplace before it will be seen by the people who go to their work very early in the morning;
一个真理在被那些每天在一大清早就跑去上班的人们认识之前，必须首先表现得不只是清楚而且还要平易。
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