We shall have to refine on our methods of advertising.

我一步改做广告的方法。

A manufacturer can amplify the demand of a product by advertising widely.

厂商能用大做广告的方法来扩大人对产品的需求。

They advertised their goods.

他为他的商品做广告。

Are lawyers allowed to advertise?

准许律师做广告吗?

Advertising is my department.

我负责做广告。