poorer

For years, climate negotiations have involved richer and poorer countries telling each other what they must or should do for the common good.

多年以来，在气候谈判中，富国和穷国常常告诉对方，必须或应该做哪些事情来维护共同利益。

But hospital administrators and medical students point out that the situation is not uniformly bad. In poorer areas where other professions may not be available, the best students are willing to risk long hours and possible violence to study medicine.

但医院管理者和医学院学生指出，局面并非全然那么糟糕。在没有其他职业选择的较为贫困的地区，那些最优秀的学生可能仍愿意冒长时间工作和遇袭的风险去学医。

The Generalized System of Preferences program aims at promoting economic development in poorer countries by providing duty-free treatment of imports into the United States from these countries.

普遍优惠制计划的目的是为这些国家出口到美国的商品提供免税待遇，以促进穷国的经济发展。