in a way that is very important for the final result of a particular situation 以对特定情况的最终结果非常重要的方式 At Waterloo Napoleon was decisively defeated. 拿破仑在滑铁卢被决定性地打败了。
in a way that shows the ability to decide quickly and with confidence 坚决的;果断的;决断的 Congress must act decisively against this threat. 国会必须对这一威胁采取果断行动。 She shook her head decisively. 她果断地摇摇头。