色情广告的英文：
sex-related commercials

sex是什么意思：
n. 性别；性；性行为

There are members of both sexes in the committee.
委员会里男女委员都有。

You know the risks of promiscuous sex.
你知道滥交的危险。

The sex discrimination act defined two kinds of sex discrimination... Direct and indirect.
《反性别歧视法》阐释了直接歧视和接歧视。

related是什么意思：
adj. 有关联的；叙述的
v. relate过去式和过去分词

incidence relation
关联关系

Curious to relate, the giraffe has no voice.
说来奇怪，长颈鹿不会出声。

Of, relating to, or being a real number.
实数的实数的、是实数的或与实数有关的

commercials是什么意思：
adj. 商业的；商业性的
n. 商业广告

Commercial invoice is a document.
商业发票是一种单证。

We are not a commercial organization.
我们是一个非营利团体。

The play was a commercial success.
这出戏从营利角度看， 很成功。