人在年幼时就开始学习，用心容易专一，没有别的事情干扰，所以容易学成。有人说，14岁前是学习的黄金时期，暂不说其中的科学依据，对于孩子来说，他们的好奇心、理解力、想象力和创作力正处旺盛期，也是集中学习受干扰少的最佳时期，因此在孩子最佳培养阶段，家长要懂得培养。

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.

死者通过我们说话，在我们的梦中，在我们的文字里。

The meaning of life is contained in every single expression of life. It is present in the infinity of forms and phenomena that exist in all of creation.

可持续性不是一种选择，而是我们对后代的责任。

A man without a homeland is like a nightingale without a song.

"A book is a fragile creature, it suffers the wear of time, it fears rodents, the elements and clumsy hands. So the librarian protects the books not only against mankind but also against nature and devotes his life to this war with the forces of oblivion."