Introduction - If you have any usage issues, please Google them yourself
Ebbinghaus memory curve concept: the information you are ready to can in one day, 2 days, 4 days, 7 days, the 11th day of the oracle script .... the day of the date of retrieval out. (Interval adjustable) for people in order to long-term memory. The typical student focus back to the scene of the English words. Has been tested.