资料来源 : pyDict

绊网,地雷拉发线

资料来源 : WordNet®

trip wire
     n 1: a small military force that serves as a first line of
          defense; if they become engaged in hostilities it will
          trigger the intervention of stronger military forces
     2: a wire stretched close to the ground that activates
        something (a trap or camera or weapon) when tripped over