These are all words for a notice, picture or film/movie telling people about a product, job or service. 以上各词均指广告、启事。

• advertisement a notice, picture or film/movie telling people about a product, job or service; an example of sth that shows its good qualities; the act of advertising sth and making it public 指广告、宣传的实例、广告活动或广告宣传：◆Put an advertisement in the local paper to sell your car. 在当地报纸登一则广告来出售你的汽车。◆Dirty streets are no advertisement for a prosperous society. 肮脏的街道绝不是繁荣社会的景象。
• publicity [U] the business of attracting the attention of the public to sb/sth such as a company, book, film/movie, film/movie star or product; the things that are done to attract attention 指宣传业、广告宣传工作或传播工作：◆She works in publicity. 她从事宣传工作。◆There has been a lot of advance publicity for her new film. 她的新电影尚未上映即大加宣传。
• ad, advert (informal) a notice, picture or film/movie telling people about a product, job or service 指广告、启事：◆We put an ad in the local paper. 我们在当地报纸上刊登了一则广告。◆an ad for a new chocolate bar 新品种巧克力棒的广告
• commercial an advertisement on television or on the radio 指电视或电台播放的广告
• promotion a set of advertisements for a particular product or service; activities done in order to increase the sales of a product or service 指广告宣传、促销活动：◆a special promotion of local products 当地产品的特别促销活动◆She works in sales and promotion. 她从事销售和推广工作。
• trailer (especially BrE) a series of short scenes from a film/movie or television programme, shown in advance to advertise it 指电影或电视节目的预告片

Patterns

• (a/an) advertisement/publicity/ad/commercial/promotion/trailer for sth
• a TV/television/radio/cinema advertisement/ad/commercial/promotion
• to run/show a(n) advertisement/ad/commercial/trailer