DZ

　　thanks for chm8624's timely help

       look up 意为“查寻、查找”，但代词作宾语时代词放中间，名词作宾语放中间或后面均可。例：
　　Let’s look it up in the dictionary.
　　让我们查查字典。
　　Look up the words in the dictionary. = Look the words up in the dictionary.