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Advertisements
广告
Nowadays, we can find advertisements almost wherever we go.
如今，无论走到哪里，我们都能看到广告。
We are so used to them that we often do not even realize how many we see and hear in aday.
人们对广告习以为常，甚至常常意识不到自己一天会看到、听到多少广告。
I did some research on advertisements, and have some very important information to share with you.
我对广告做了一些研究，有些很重要的信息与你们共享。
What is an advertisement?
什么是广告？
An advertisement uses words and pictures to persuade people to buy a product or service, orto believe in an idea.
利用言语和图片劝服人们购买某种产品或某项服务，或者相信某种观点。
Newspapers, magazines, the Internet, radio and television are the most common places to find them.
报纸、杂志、互联网、收音机和电视上最常见。
There are two main types of advertisements－commercial advertisements and public service advertisements (PSAs).
主要有两种类型的广告—商业广告和公益广告（PSAs）。
A commercial advertisement is one which someone has paid for to advertise a product or service.
商业广告是人们为了推销某种产品或服务而花钱做的广告。
PSAs are often run for free, and are meant to educate people about health, safety, or any other problem that affects public welfare.
公益广告往往是免费投放的，旨在就健康、安全或其他影响公共福利的问题教育公众。
