translation.en: So Dan demonstrates the many self-learners who take this course off the Web, on their own traction, on their own initiative, and it's quite amazing because these people cannot care less about grades.
translation.zh: 所以Dan证明了许多自学者 他们在线下完成了这一课程，靠着他们自己的牵引力 靠着他们自己的主动性，这是相当令人吃惊的，因为 这些人不能不在意 成绩