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Why do you translate 'прочитать' as 'buy'? :wink:[/quote]

Good question. I must have been drunk. :D

If you drink enough beers, прочитать looks like покупать.

Here is my guess
First of all достаточно is an adverb and хватаеть is a verb.

достаточно = enough/sufficient
хватать = to be enough, to be sufficient
Also depending on context
хватать = to...