1. A cat can retract its claws. 
   猫能缩回爪子。
2. To recant or retract something sworn. 
   食言取消或撤回所发的誓
3. shotcrete and rock bolt 
   喷锚支护
4. To retract(something spoken); unsay. 
   收回（所说的某些话）；撤回（前言）
5. To retract something that one has said. 
   食言对自己说的话又反悔

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