proponent

/prəˈpoʊnənt/

a person who pleads for a cause or propounds an idea

中文释义：支持者；倡导者

She is a strong proponent of renewable energy and environmental protection.

她是可再生能源和环境保护的坚定支持者。

Proponents of the new policy argue that it will boost economic growth.

新政策的支持者认为它将促进经济增长。