translation.en: Before, effort and difficulty made them feel dumb, made them feel like giving up, but now, effort and difficulty, that's when their neurons are making new connections, stronger connections.
translation.zh: 在此之前，努力与困难 让他们感觉自己很笨， 让他们想放弃， 但如今，正是努力与困难让 他们大脑中的神经元得以形成新的连接， 更强的连接。