1. Do you mind my smoking in this carriage?
你对我在车厢里抽烟有意见吗？
2. Smoking in this railway carriage is prohibited.
在车厢里抽烟是不允许的。
3. No smoking in the carriage
三在车厢内禁止吸烟
4. Smoking in this railway carriage is prohibit ed.
本节车厢禁止吸烟。
5. Or, perhaps, lighting up in a non-smoking carriage;
又好像在一节禁烟车厢点烟一样愚蠢。