retracts

例句:

• A cat retracts its claws.
  猫缩进它的爪子.
  
• The split graph is given endomorphism images are retracts.
  给出了任意自同态像图都是收缩核的分裂图的结构.
  
• The structure retracts vertically, so the inclining columns are used.
  结构竖向内缩, 采用斜柱的处理效果良好.
  
• He laughs nervously at the observation and then retracts hastily.
  来自THETIMES
• He undoes his seat belt, guiding it with his hand as it retracts, back behind his left shoulder.
  来自NEWYORKER
• Over time, the disk gradually retracts, so that it is no longer pressing on the nerves, and the inflammation subsides.
  来自NEWYORKER