经营一家属于自己的公司是我的职业理想 和 去年夏天，我在一家广告公司实习了两个月 英语怎么说？

operating my own company is the professional ideal of mine

last summer, i had a 2- month internship in an Advertising company

（good luck with your interview）

I have a dream that I can own a company.
Last summer, I worked as a jackaroo in an advertising company for two months.