Ject对"广告公司" 的正确翻译：advertisement company。例句参考：营业额在某特定时期内所做业务的总量，如一家广告公司或法律公司 - The total amount of business done in a specific period, as by an advertising agency or a law firm.；我们雇用了一家广告公司来推销我们的产品。 - We hired an advertising company for help to sell our product.；相关词条：advertising agency；Advertising Company；