Few people behave disinterestedly in life .

生活中很少有人能表现得廉洁无私。

But, in addition, it is the foundation for practical results that would not have been reached if this knowledge had not been sought disinterestedly.

但此外，纯理论知识还是实际结果的基础，若不能客观公正的追寻这类理论知识，也不可能实现那些结果。

When I glow up, I could never forget that apart from my own mother, no one had loved me so fondly and so disinterestedly, with no expectations whatever.

等我长大以后，总感到除了母亲，再没有谁能够像他那样朴素地疼爱过我——没有任何希求，也没有任何企望的。