| 单词 | patrol | 
| 释义 | Word Frequency patrol(pəˈtrəʊl) noun 1.  the action of going through or around a town, neighbourhood, etc, at regular intervals for purposes of security or observation  2.  a person or group that carries out such an action 3.  a military detachment with the mission of security, gathering information, or combat with enemy forces 4.  a division of a troop of Scouts or Guides  verbWord forms: -trols, -trolling or -trolled 5.  to engage in a patrol of (a place) Derived formspatroller (paˈtroller) noun Word originC17: from French patrouiller, from patouiller to flounder in mud, from patte paw | 
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