Dear Sir or Madam,
I’m writing to lodge the complaint about the poor quality of an air conditioner that I purchased from Sun Appliance Company. 亲爱的先生或女士，我写这封信是想投诉件事，我在你们阳光电器公司买到一个质量很不好的空调。
Which is better, shopping online or traditional shopping? Different people have different attitudes towards it. Some people think that online shopping is very convenient.