新概念英语第三册 Lesson47(4)

英语自学网

5. However, there is an even more insidious kind of pollution that particularly affects urban areas and invades our daily lives, and that is noise.
However, even more insidious, particularly 等词，很好地衔接了上下文，强调了第三段所要论述的噪音的危害性，注意体会。
6. 推荐背诵：Car alarms constantly scream at us in the street and are a source of profound irritation. 在街上，汽车的防盗警报不断对我们吼叫，这是人们极度烦燥的一个原因。
to be a source of 是...的来源，比较规范的用语，如：
Her husband earns a lot of money every month and he is a source of income. 他的丈夫每月能赚很多钱，这是他的一棵摇钱树。
7. 推荐背诵：The survey revealed a large number of sources of noise that we really dislike.
8. 推荐背诵：New technology has also made its own contribution to noise. 新技术也为噪音作了贡献。(本句有讽刺意味)
make contribution to 对...作出贡献
contribute to 引起，导致，是......的起因，如：
Air pollution contributes to disease. 空气是一些疾病的原因。