concertina 

76798
单词释义
n.六角手风琴
vi.(像六角手风琴一样)折起,折叠
词性拓展记忆 / 词形拓展记忆
原形:concertina复数:concertinas
词组和短语补充/纠错
concertina wire 蛇腹钢丝
单词例句
All of this is accessed through gull-wing doors and deployable concertina steps.
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