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并列连词
连接具有并列关系的词、短语或句子。
⒈ 并列关系：and，not only…but also…，both…and…，neither…nor…
如：I used to live in Paris and London.
Both Jane and Jim are interested in fishing.
The weather here is neither too cold nor too hot.
She is not only kind but also honest.
⒉ 转折关系：but，yet，while（然而），when（然而，偏偏）
如：The car is very old but it runs very fast.
The problem was a little hard,yet I was able to work it out.
The winter in Beijing is very cold while that of Kunming is warm.
Why did you borrow the book when you had one?
