To learn difficult language that I think is probably the usual things that we apply to what we do in everyday life, for example for people who have a hobby of listening to music then try listening to a song with the lyric English and find out what is the meaning of content of the song. For people who like to read may be in trying to read English-language books. And may be is slowly we use in communicating with others, it will get used to if we get used.
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