I am learning:
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Advanced English vocabulary
The goal of this stack is to improve your English vocabulary and to take you to an advanced level of knowledge of English words and phrases.
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English Everyday Phrases and Collocations
Phrases I found interesting or useful (taken from films, podcasts, radio programmes and books)
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jQuery selectors
jQuery 1.3 selectors, fiszki do nauki from http://docs.jquery.com/Selectors