英汉词典

1. 烟叶;烟草(制品)
    Tobacco is dried leaves which people smoke in pipes, cigars, and cigarettes. You can also refer to pipes, cigars, and cigarettes as a whole as tobacco .

    e.g. Try to do without tobacco and alcohol...
           尽量不要抽烟喝酒。
    e.g. I believe it is time to ban tobacco advertising altogether.
           我认为该完全禁止烟草广告了。

2. 烟草植株
    Tobacco is the plant from which tobacco is obtained.