sound off
动词- To hold forth about something in an opinionated manner. · I'm sick of his sounding off about how he thinks this country should be run!
- Command instructing a person to speak up or acknowledge something.
- Command instructing a person to confirm that they are present or that some other objective has been met.
在真实文章中学习sound off
注册免费账号后，在图书馆中把鼠标悬停在任何单词上即可看到意思，还能听朗读、收藏单词并按你的记忆安排复习，看到每本书你已经认识多少。