当发言人确认项目进展顺利时，一阵如释重负的感觉在听众中弥漫开来。
A wave of relief suffused the audience when the speaker confirmed the project was on track.
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解释
情感或气氛逐渐充满、遍布人群或空间
A wave of relief suffused the audience when the speaker confirmed the project was on track.
情感或气氛逐渐充满、遍布人群或空间