New to the job, he was keen to demonstrate his sureness of mind.刚接触这份工作，他急于展示自己的聪明才智。He spoke with a newfound sureness in his voice.他的声音显露出新有的自信。She performs with the sureness of a veteran actress.作为一名资深演员，她的表演胸有成竹。I admire her lightness/sureness of touch as a cook.我欣赏她做厨师的精细／踏实劲儿。