activeness

n. 积极性, 主动性

例句与用法：

A person who actively favors or strives for progress toward better conditions, as in society or government.

进步人士积极支持或争取朝好的形势进步的人，尤指在社会或政论领域方面

One who demonstrates an actively aggressive or combative attitude, as in an argument.

鹰派人物如在争论中显示出一种积极好战的或有侵略性态度的人