These are important linking phrases in English. To answer this question, I will highlight the important things I think you need to know about how to use them and provide some examples.这一对是英语中非常重要的连接词组。我说几个使用要点，并举几个栗子。
Things you need to know:
Examples:
On the one hand I don't know if I answered this question. On the other hand, I hope my answer is helpful.
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栗子的知乎答案索引：栗子树
栗子的微信公众号：E-Speller 或者 栗子英文
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