[Story] Once again, the main character aimed to gain knowledge about the human brain. He chained himself to a train of thought, enduring the pain of learning, but he knew that in the end, the gain would be worth it.

[参考翻译] 再次，主角的目标是获得关于人脑的知识。他将自己束缚在一连串的思考中，忍受着学习的疼痛，但他知道最终的收获将是值得的。

[Words]

  1. again [əɡen] adv 再次
  2. aim [eɪm] n/v 目标，瞄准
  3. brain [breɪn] n 大脑
  4. chain [tʃeɪn] n/v 链，束缚
  5. gain [ɡeɪn] n/v 获得，增加
  6. main [meɪn] adj 主要的
  7. pain [peɪn] n 疼痛
  8. train [treɪn] n/v 火车，训练