Why are there so many lessons?

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There are so many lessons that i have not enough time to read!yes i like to read something interesting thoughtful or and to do something i like .it is ture that i like bionomy ,which is my specialty in college.while we lot of outlying things such as electronice,metalworking and experimentations of them.i cannt understand and i got nothing when i asked for my teacher~~~~~ tomorrow i will have electronice lessons for a whole night~~~~~~