The international monetary system is the glue that holds the world economy together.
国际货币体系是将世界经济联系在一起的粘合剂。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
A proof tells us where to concentrate our doubts.
追求知识是一段永无止境的旅程,这正是它如此令人兴奋的原因。