Die Mathematik ist die Wissenschaft von den Beziehungen zwischen den Begriffen, unabhängig von deren Inhalt.
数学是关于概念之间关系的科学，与这些概念的内容无关。
乳制品生产的创新必须在效率和环境责任之间取得平衡。
你活得越充实，就越不害怕死亡。
If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."
The most dangerous chemical in any plant isn't the one in the vats - it's complacency.
"A good book should leave you... slightly exhausted at the end. You live several lives while reading it."