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.
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