原句是:

The TOP official has duty to protect young from carbon emissions.

另外,还有I have work to do中的不定式to do,也是相同的句子成分吗?

望老师予以解答,谢谢了!

The TOP official has duty TOProtect young from carbon emissions.

上面句子中的不定式作定语,have duty to dosth 意思是“有做做某事的责任”。

类似地,在I have work to do中,不定式to do,也是定语,意思是“有要做的工作”。