concertina

noun

1. 六角手风琴
   a musical instrument like a small accordion , that you hold in both hands. You press the ends together and pull them apart to produce sounds.

verb

1. （像六角手风琴一样）折起，折叠
   to fold up like a concertina
   1. The truck crashed into the tree and concertinaed.
      货车撞在树上撞扁了。

1. 六角手风琴
   A concertina is a musical instrument consisting of two end pieces with stiff paper or cloth that folds up between them. You play the concertina by pressing the buttons on the end pieces while moving them together and apart.

1. Binding styles of Chinese ancient books mainly include bamboo or wooden slips, scroll, concertina binding, chinese path binding, butterfly binding, back-wrapped binding, thread binding and others.
   中国古代书籍的装帧形式主要有简策、卷轴装、经折装、梵夹装、蝴蝶装、包背装、线装等。
2. In truth, the Expo by itself has changed little in Shanghai, rather it has been an excuse to concertina a series of investments that were already on the books, squeezing a decade of plans into three or four years.
   事实上，世博会本身并没有给上海带来什么变化，它只是成了一举落实大批投资的借口，十年计划压缩成了四年的计划。
3. But their words helped pierce the concrete and concertina wire of the Iron Curtain.
   但他们的话洞穿了铁幕的混凝土和铁丝网。
4. But this concertina movement requires a lot of energy.
   但这种伸缩运动需要大量能量。
5. After a while he had taken down his concertina and played upon it the six very mournful airs that he knew.
   隔了一会儿，他拿下手风琴，拉出他熟悉的那六节缠绵悱恻的曲调来。
6. It might just be possible to concertina the three meetings into one morning.
   把三个会议压缩在一个上午开许是可能的。
7. If I could get that dressmaker to make a concertina skirt like Susy Nagle's.
   我要是能叫裁缝给我做一条苏西。内格尔那样的百褶裙该有多好。
8. The homologous bionic physical structure is designed in accordance with snakes 'concertina motion principle.
   根据蛇的伸缩运动机理，设计了蛇形机器人的仿生机械结构。
9. Bionic research on concertina motion of a snake-like robot
   蛇形机器人伸缩运动仿生研究
10. The principle, characteristics and the unique environments of both horizontal concertina motion and vertical concertina motion had been discussed in detail subsequently.
    详尽分析了水平面内和垂直面内伸缩运动的运动机理、运动特点和它们所能适应的特殊环境。
11. Tool electrode driven by piezoelectric actuator makes concertina movement each pulse discharge, achieving micro-feeding.
    每次脉冲放电，工具电极都在压电致动器的驱动下作伸缩运动，从而实现微进给。

noun

1. free-reed instrument played like an accordion by pushing its ends together to force air through the reeds

2. coiled barbed wire used as an obstacle

verb

1. collapse like a concertina