[解析]
W:Bob,I'm sure you know about second﹣hand smoke.
M:Of course,I do.
W:But have you heard about third﹣hand smoke?
M:Third﹣hand smoke?I'm afraid not.What is that then?
W:Well,it is here in today's paper.Parents may think they are protecting children from second﹣hand smoke when they smoke outside their home or only when the children are not there.But now researchers are warning about what they call third﹣hand smoke.When you smoke dangerous matter from cigarettes get into your hair and clothing.As babies are the weakest,when you come to a baby,you pass it to the baby and increase the chances of disease in the baby.
M:Is that so?In that case I have to say that I should never get close to a baby.
W:That's right.Actually all smoking parents should do the same or better give it up completely.