4. 表示对比或对照

by contrast, but, conversely, in contrast, instead, on the contrary, on the other hand, otherwise, unlike, whereas, while, yet

af) The birth rate for older women has declined, but, by contrast, births to teenage mothers have increased.

ag) The purpose of the scheme is not to help the employers but to provide work for young people.

ah) American consumers prefer white eggs; conversely,British buyers like brown eggs.

ai)Scandinavian cruises are very popular in the summer;conversely, the Caribbean is most popular in the winter.

aj)The stock lost 60 cents a share, in contrast to last year, when it gained 21 cents.

ak) Instead of being annoyed, he seemed quite pleased.

al)It wasn't a good thing; on the contrary it was a huge mistake.

am) Nuclear power is relatively cheap. On the other hand,you could argue that it's not safe.

an) It is equally vital that both should be mentioned, otherwise a client, particularly a buyer, could be seriously misled.

ao) Unlike most people in the office, I don't come to work by car.

ap) A bowl of instant oatmeal costs about $.15, whereas regular oatmeal costs only $.05 per bowl.

aq) The old system was fairly complicated whereas the new system is really very simple.

ar) Schools in the north tend to be better equipped, while those in the south are relatively poor.

as) Last summer there was a drought, yet some people were still watering their lawns every day.