1. 手电筒
    A torch is a small electric light which is powered by batteries and which you can carry in your hand.

2. 火把;火炬
    A torch is a long stick with burning material at one end, used to provide light or to set things on fire.

    e.g. They lit a torch and set fire to the chapel's thatch.
           他们点着一支火把，放火烧了小教堂的茅草屋顶。
    e.g. …a torch-lit march for peace.
           要求和平的火炬示威游行

3. 吹管;喷灯;氧乙炔炬
    A torch is a device that produces a hot flame and is used for tasks such as cutting or joining pieces of metal.

    e.g. The gang worked for up to ten hours with acetylene torches to open the vault.
           那伙匪徒为打开金库用氧乙炔炬干了长达10个小时。

4. 纵火焚烧;放火烧
    If someone torches a building or vehicle, they set fire to it deliberately.

    e.g. The rioters torched the local library...
           暴乱者放火烧了当地的图书馆。
    e.g. Cars and trucks have been torched, bottles and bricks thrown.
           轿车、卡车被放火焚烧，瓶子与砖块乱砸乱飞。

5. 暗恋;对…单相思
    If you say that someone is carrying a torch for someone else, you mean that they secretly admire them or love them.

torch在线翻译

    e.g. He has always carried a torch for Barbara.
           他一直单恋芭芭拉。

6. (为…)奋战;(为…)奋斗
    If you say that someone is carrying the torch of a particular belief or movement, you mean that they are working hard to ensure that it is not forgotten and continues to grow stronger.

    e.g. This group aims to carry the torch for the millions who demonstrated and the thousands who died...
           这个团体旨在将游行示威的数百万人与死去的数千人的信念传承下去。
    e.g. Since his death in 1985 his widow has carried the torch of his Stalinist legacy.
           自从他 1985 年去世以来，他的遗孀一直致力于保存和发扬他的斯大林主义遗产。