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study
diligence; working hard
experience; knowledge; lesson (for the future)
discount; price reduction
昨日三時間も勉強した。
I studied for three whole hours yesterday.
もっと勉強しないと間に合わない。
If I don't study more, I won't make it in time.
図書館で勉強するのが好きです。
I like studying at the library.