adj.自信的,自持的;
例句:
Success is self confident , failure fear the stronger others.
成功者不生气而是争气, 失败者生气而不争气.
She'd blossomed into a self-confident young woman.
她已长大成为了一个自信的年轻女性。
[不可数名词]He has no self-confidence.
他毫无自信。