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.

You have to be patient; great things take time to build.

The beauty of music lies in its ability to evoke emotions without saying a word.

描述宁静的田园生活，表达淡泊之志。

The advancement of robot technology is to make human life better.

浮动汇率并非解决所有经济问题的万能药，但它们可以提供一种有用的调整机制。