level of confidence

基本解释

Your level of confidence is determined by the way you perceive the world.
你們的自信水平取決於你們感知世界的方式。
If your level of confidence in what you know never ever decreases, you may not be learning enough.
如果你的自信心水平在你所熟知的領域從未下降過，這就証明你學的還不夠。
People tend to find confident voices more attractive and level of confidence can change over time.
人們普遍覺得自信的聲音更有吸引力，而人的自信程度時常變化。

"Now,with large epidemiological studies done everywhere including here, we can say with a great level of confidence that the disease affects roughly the same percentage of the general public worldwide.
Because you'll have an appropriate level of confidence and competence in your ability to do computational problem solving.
因爲你們在自己的能力範圍內,擁有應對解決計算問題的,正儅水平的自信心和競爭力。
麻省理工公開課 - 計算機科學及編程導論課程節選
And then you'll find that your level of competency increases, your confidence level improves,
到時候你會發現你的能力提高了，信心增強了，
學第二外語的時候 - SpeakingMax英語口語達人

Showing your torso is one way of demonstrating a high level of confidence, security or trust.
FORBES: President Obama, Congress, and the Body Language of Negotiation