Definition: confidence Level: C2
他在新闻发布会上沉着而自信地回应。
He responded with calm ___assurance during the press conference.
她信心十足地处理了这个复杂的问题。
She tackled the complex problem with ___assurance.
她对自己的决定信心坚定不移。
Her ___assurance in her decision was unwavering.
