俄罗斯正在集中力量。

The concept of law is a complex one, involving not only rules but also principles, policies, and standards.

Time is not a thing, thus we can neither waste nor save it; it is always with us.  

"Writing is a way of talking without being interrupted."

Quality is never an accident; it is always the result of intelligent effort.

数学是秩序和模式的科学，正是这种秩序让我们能够理解周围的世界。