确信

He spoke with such assuredness that everyone believed his story.
他说话时那种确信无疑的态度使每个人都相信了他的故事。
Her assuredness in her abilities impressed the interview panel.
她对自己能力的信心给面试官们留下了深刻印象。
Despite the challenge, she approached the task with complete assuredness.
尽管面临挑战，但她处理任务时却充满了十足的信心。
The experienced teacher entered the classroom with an air of assuredness.
经验丰富的老师带着自信的姿态走进了教室。
His assuredness about the stock market investment paid off handsomely.
他对股市投资的笃定最终带来了丰厚的回报。
She walked onto the stage with a natural and unforced assuredness.
她走上舞台时自然流露出从容不迫的自信。
The captain's assuredness in handling the emergency situation calmed the passengers down.
船长在应对紧急情况时表现出的镇定自若安抚了乘客的情绪。
His confident assuredness during the debate won him many votes.
他在辩论中的坚定自信为他赢得了许多选票。
With years of practice, she had developed a sense of assuredness when playing the piano.
经过多年的练习，她在弹钢琴时已经形成了一种自信感。
The doctor's professional assuredness put the worried patient at ease.
医生的专业自信让担忧不安的病人安心不少。