concertina的复数形式怎么写

Its main bridge - a huge concrete structure - now lies concertina ed on the riverbed.钢筋混凝土结构的主要桥梁,被扭扁坍塌在河床.Fanfold: Also called Accordion fold , Concertina fold , Over and back fold , Zigzag fold.扇形摺: 亦称风琴摺, 之字摺.High sto...

n.类似风琴的六角形的乐器...

concertina的音标：concertina的英式发音音标为：[ˌkɒnsə'ti:nə]concertina的美式发音音标为：[ˌkɑnsər'tinə]...