section off something
— phrasal verb with section /ˈsek·ʃən/verb [ T ]
to separate one thing from another, or to divide into equal or similar parts:
Security agents sectioned off the area where she shopped.
英语词典包含110679条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。