speak up 大声说
join in 参与
chime in 插话
voice opinion 表达意见
1. He finally piped up during the meeting.
他终于在会议上开口说话了。
2. Someone needed to pipe up and ask the question.
有人需要站出来问那个问题。
3. She piped up with a clever remark.
她突然插话说了一句巧妙的评论。
A: No one seems to have an idea.
A：似乎没人有主意。
B: I think I should pipe up.
B：我想我该开口说一下。
1) 突然发言或插话
2) 表达意见或评论
3) 在沉默后开始说话
突然开始说话或插入意见
e.g.She piped up when she heard the unfair comment.
当她听到不公平的评论时，她开口说话了。
phrasal verb
1. To suddenly speak or interject, often after a period of silence.
Synonym: speak up, chime in