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Thế nào là một từ điển tốt ? Hướng dẫn chọn từ điển như ý

Good dictionaries in general, and learners' dictionaries in particular, can tell you a lot more about a word than just its meaning, including (among other things):
- Synonyms [words with the same or similar meaning], e.g., mislay
and misplace
- Collocations [how words go together], e.g., living is often used
in these phrases: make a living/ do something for a living; cost
of living; standard of living; living things; living conditions; living
daylights.
- Pronunciation: This will mean learning some symbols that are
different from the letters of the English alphabet.
- Word Stress: often shown by a mark before the stressed syllable
- Syllable division, e.g., reg*gu*lar*ly
- Difference between varieties of English, such as American, Australian,
and British English.
- Word Class:(usually abbreviations, e.g., n:noun, adj: adjective, etc.),
whether a noun is countable or uncountable, and whether a verb is
normally transitive (needs an object) or intransitive (doesn't need
an object).
- Usage (how a word is used and any special grammatical pattern that
goes with it): e.g., suggest + (that) + clause - "I suggest (that)
you call her."
- Labels that give infomation about style and use in special
situations (formal, informal, taboo, technical, dated).
- Don't forget that most words have more than one meaning.
So be careful!

(Trích từ cuốn New Vocabulary in use - Upper Intermediate - An effective Self-Study Reference and Practice for English Learners)