1. A formal statement of retraction. 
   正式的撤回声明
2. capable of retraction; capable of being drawn back. 
   能收回的；能拿回的。
3. To make a formal retraction or disavowal of a previously held statement or belief. 
   撤回声明，放弃信仰对曾作的声明或所持的信仰宣布正式收回或放弃
4. To make a formal retraction or disavowal of(a statement or belief to which one has previously committed oneself). 
   撤回声明；放弃信仰对（某人原来曾做的声明言论或他的持有的信仰）作正式的撤回或放弃
5. Jack up a car 
   用千斤顶把汽车顶起来

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• 1. 收放机构
  retraction jack 收放机构...retraction lock 防收锁
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