Without this ceiling,its share would be even higher since,like other countries with high per capita income,it would have been required to contribute to the cost of reductions for the countries with low per capita income.

• 没有这一上限，美国的份额甚至会更多，因为同其他人均收入高的国家一样，美国要为其他人均收入低的国家减少开支。