concertinaed/ˌkɑːn.sɚˈtiː.nə/动词折叠；挤压；压叠在一起Could we concertina the three meetings into one morning?我们能把3个会议压缩在一个上午开吗？/ˌkɑːn.sɚˈtiː.nə/名词六角手风琴想跟读，去练习
