big tobacco       
noun [ U ] (also Big Tobacco) uk/ˌbɪɡ təˈbæk.əʊ/ us/ˌbɪɡ təˈbæk.oʊ/
 (含贬义)大烟草公司
large tobacco companies, especially when these are seen as having a powerful and bad influence
  Some lung cancer sufferers point the finger at Big Tobacco for persuading them to become chain-smokers.  一些肺癌患者将矛头指向大烟草公司,指责这些公司让他们变得烟不离口。