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。
The only limit to our realization of tomorrow is our doubts of today.
The ocean doesn't belong to any one nation; it's a shared resource that requires global stewardship.
海洋不属于任何一个国家;它是一种需要全球管理的共享资源。