1. He spoke confidently and with ease.
    他很有把握、毫不拘束地进行演讲。

2. ´No,´ I answered confidently.
    "没有。"我自信地回答说。

3. “Forty pounds,” I tell her, none too confidently.
    "40磅吧。"我告诉她，一点儿也不自信。