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。

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。

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。

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。