Countries under the Agreement

例句：

1. 1. The United Nations isa group of countries working together to promotepeace and development.
   联合国是一个由多个国家组成的组织，致力于促进和平与发展。
2. 2. China hasa long history of territorialexpansion, which has led to the establishmentof many countries.
   中国有着悠久的领土扩张历史，这导致了许多国家的建立。
3. 3.Countries around the world are facing differentchallenges in their economic development.
   世界各国在经济发展方面面临着不同的挑战。