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15.13 always use the same keywords repetition of words is not a problem 1. Never invent synonyms for keywords. The reader may think that each term has a different meaning.
2. When you refer back to a keyword used earlier and there are many words between the keyword
and what you are writing now, it is better to repeat that keyword rather than using a generic form (e.g.
hydrogen … hydrogen , rather than
hydrogen … this gas ). If you just use the generic term (e.g.
this gas ) or a pronoun (
it ), the reader maybe forced tore- read the paragraph to understand what subject you are referring to.
3. It is not considered bad style to repeat the same preposition. Prepositions are not generally interchangeable and therefore only the correct preposition should be used.
4. It is perfectly acceptable to use synonyms for non-key words such as verbs (e.g.
carry outperform i ), adjectives (e.g. important, crucial ) and adverbs (e.g. often, frequently ).
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