句子使用并列谓语'learned'和'perceived'，简洁明了地描述了两种不同的学习或感知方式，结构平衡。
Blind and deaf, Helen Keller transformed from a pitied, obscure little girl into a woman revered worldwide through sheer effort. If life is truly unfair, the injustice she faced was extreme. She could have easily abandoned her dreams, hiding in a dark corner to weep, with no one to blame her; she could have also lain in bed or sat in a wheelchair, living like a vegetable, dependent on others' care.
Yet, she did none of that. With the help of her teacher, she painstakingly learned Braille and perceived the world by touching things. Relying solely on her unyielding belief and persistent will, she painted the sky of her dreams with the brightest colors of life.
海伦·凯勒双目失明、两耳失聪，却凭借非凡的努力，从一名令人同情且默默无闻的小女孩，蜕变为令全世界尊敬的女性榜样。如果生活真的存在不公，那么命运对她的苛刻可谓达到了极致。她本可以放弃梦想，躲进阴暗的角落痛哭流涕，无人会因此责怪她；她也可以终日卧床或坐在轮椅上，如同植物人一般由人照料。
然而，她并未选择退缩。在老师的协助下，她艰难地学习盲语，通过触摸感知万事万物。仅凭那份永不言弃的信念和持之以恒的意志，她为理想的天空涂抹上了人生最亮丽的色彩。