And you're working away until late at night, and you're very, very careful, and you're drinking coffee and you're paying attention, but, occasionally, when you're copying this by hand, you're going to make a little typo, a spelling mistake -- substitute an I for an E, or a C for a T.
夜遅くまで作業します とても注意深く コーヒを飲みながら 気をつけてはいるものの でも 手で書き写していると 間違えることもあるでしょう e を i と書き間違えたり T を C と書いたり