torch             
 noun uk/tɔːtʃ/ us/tɔːrtʃ/
B2 [ C ] UK (US flashlight)手电筒 
a small light that is held in the hand and usually gets its power from batteries
  She flashed/shone the torch into the dark room. 她用手电筒照了照黑暗的房间。 
  [ C ]火炬;火把 
a thick stick with material that burns tied to the top of it, used to give light
  a flaming/blazing torch 熊熊燃烧的火炬 
literary Many buildings were put to the torch (= burned intentionally) during the riots. 暴乱中许多建筑物被付之一炬。 
  [ S ] approving(象征具有重大积极影响的政治运动或思想的)火炬 
used as a symbol of a political movement or idea that has an important positive influence
  She promised that the party would carry the torch of progressivism into the next decade. 她承诺该党将继续秉持进步主义理念,进入新的十年。 
 - More examples
 - The torch sends out a powerful beam of light.
 - The policeman walked along the street, shining a torch into every car.
 - The lighting of the Olympic torch symbolizes peace and friendship among the nations of the world.
 - She flashed the torch into the dark room.
 
torch       
verb [ T ] uk/tɔːtʃ/ us/tɔːrtʃ/
 放火烧,纵火烧(建筑物或其他大型物体)
to burn a building or other large thing, intentionally and usually illegally
  They smashed a side door to get in and then torched the warehouse when they had taken what they wanted. 他们从侧门破门而入,在拿走了他们所要的东西后将仓库付之一炬。