鉴戒

例句：

1. 1. We should learnfrom our mistakes and improve ourselves.
   我们应该从错误中学习并自我提升。
2. 2. He tooklessons from a professional teacher to improve hisskills.
   他向一位专业老师学习以提高他的技能。
3. 3. This book is a great sourceof knowledge for anyone who wants to learnfrom it.
   这本书是任何想要从中学习的人的宝贵知识来源。