look though ,look up和refer to的区别

look though ,look up和refer to的区别
都做“查阅”意义时的不同

look through:仔细查看,
例句 He looked through his note book before the exam
他考试前仔细翻阅了笔记
look up 查找,
例句 Look up the word in a dictionary
在字典里查这个词
refer to 参考,
例句 Refer to the textbook to get the solution
参考教材获得解答

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