★consult和look up均有“查阅、查寻”等意，但在具体用法上有所区别：

consult——查阅（词典、书籍等）

look up——（在词典、书中）查寻

eg:查词典→consult the dictionary=refer to the dictionary

   查单词→look up the word

★实战演练：

I will consult the dictionary for the meaning of that word.

我会在词典里查那个单词的意思。

My teacher is so smart,he hardly ever needs to refer to the dictionary.

我的老师非常聪明，他几乎不用查字典。

I must look up that difficult word in the dictionary.

我必须在词典里查那个难理解的单词。

Don't be ashamed to look up words in the dictionary.

不要耻于用字典查单词。