To sound off about something, 有抱怨的意思。
"Local residents sounded off about plans to cut library hours," 当地居民对缩短图书馆的开放时间表示不满。
"The player sounded off about the team’s decision to fine him for cursing," 这个球员骂人被球队罚款，因此大发牢骚。
"New York Mayor Bloomberg sounded off about a study that said 98 percent of the public spaces in Manhattan exceed healthy noise levels," 有研究说，纽约曼哈顿公共区域98%的地方噪音都超过了健康标准，纽约市长布隆伯格对研究结果表示不满。
好的，今天我们学习的词是sound off. 赶紧试试用这个英语词组在下面留言区造个句子吧！