贫国

fā dá guó jiā yīng gāi bù yí yú lì de zī zhù pín guó

发达国家应该不遗余力地资助贫国。

Developed nations should spare no effort to finance their economically disadvantaged counterparts.

fù guó hé pín guó zài cái fù shang de chā jù

富国和贫国在财富上的差距

the disparity of wealth between rich and poor countries