Developing countries, led by Brazil and India, are seeking a waiver （on public health grounds ）of rules that guarantee 20-year patents on medicines.
Developing countries, led by Brazil and India, are seeking a waiver （on public health grounds ）of rules that guarantee 20-year patents on medicines.
这样读这个句子，会不会比较容易理解？意思是...为了公共保健的理由，谋求废除那些规定药品具有20年专利权的条规。