文档介绍：Unit 18
How to Use a Dictionary
of dictionaries
1) Monolingual dictionaries dictionaries
   Monolingual dictionaries are written in one language, while bilingual dictionaries are written in two languages.
Bilingual dictionaries are of the two types". One is that the entries are defined and explained in the same language with other is that the entries are defined in one language and given their foreign equivalents.
2)Linguistic and encyclopedic dictionaries
  Linguistic dictionaries aim at providing linguistic information about the head words, such as pronounciation, spelling, meaning, part of speech, etc..
Encyclopedic dictionaries are of the two kinds:one is encyclopedia, which aims at providing encylopedic information about the headwords. The other is encyclopedic dictionary, which shares the characteristics of both a linguistic dictionary and an encyclopedia.
3)Unabridged, Desk and Pocket Dictionaries
   An unabridged dictionary is, theoretically, plete record of all the words in use, though in fact, it is not.
A desk dictionary is a medium-sized dictionary which usually has a vocabulary of about 50,000 to 150,000.
   A pocket dictionary usually contains a vocabulary of less than 50,000 words. A pocket dictionary usually provides only the information related to pronounciation and spelling.
4)Specialized dictionaries
   Specialized dictionaries usually focus on one area of knowledge. They provide detailed information in a particular subject.
2. Use of dictionaries
1) Choice of dictionaries
   The following factors should be considered:
(1) the dictionary users' level of English:
Generally speaking, a monolingual dictionary is appropriate for those leaners well above the intermdiate level. For one who is below that level, a bilingual dictionary is the proper choice.