The dictionary is living teacher.Whenever you come across a new word, just consult it and you will get a clear definition from it.Every student, no matter attending school or self-taught, should always have a dictionary at hand.As a study aid, it is convenient, inexpensive and allknowing.
字典是一个活老师。当你遇到新的单词时，可以查字典你会找到非常清楚的定义。不论是在校学习还是自学，每个学生都应该手头准备一本字典。作为一个学习工具，字典非常方便、便宜而且知识全面。
