人们生产生活资料的方式首先取决于他们发现并必须再生产的实际手段的性质。
The way in which men produce their means of subsistence depends first of all on the nature of the actual means they find in existence and have to reproduce.
"The poem is not a closed field, but an open one."
The true power of mathematics lies in its ability to simplify the complex and reveal the underlying patterns of the universe.
The truth is a beautiful and terrible thing, and should therefore be treated with great caution.
