The dictionary is a living teacher.Whenever you come across a new word, just consult it and you will get a clear definition.Every student whether attending school or self-taught, should always have a dictionary at hand.As a study aid, it is convenient, inexpensive and almost omniscient.

　　辞典是老师。当你遇到生词时，只要请教辞典，你将会得到明晰的定义。每一位学生，不管是在校生还是自学者，手中都该有本辞典。作为学者的助手，辞典方便、便宜，几乎无所不有。