It requires indeed some courage to undertake a labor of such far-reaching extent.
确实需要一些勇气来承担如此影响深远的工作。
The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.
任何实验的价值和效用都取决于材料是否适合其使用的目的。
My scientific studies have afforded me great satisfaction; and I am convinced that it will not be long before the whole world acknowledges the results of my work.
我的科学研究给我带来了极大的满足；我深信，用不了多久，全世界都会承认我的工作成果。