单一货币的最大优势在于消除了汇率不确定性并降低了交易成本,从而促进贸易和投资。
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
数学的本质在于它的自由。
艺术应该是可能性的空间。