系统解析:这是说客观事实用一般现在时, 表示不要做某事用否定祈使句don't+动词原形, 害怕做某事be afraid of doing sth, 犯错误make mistakes(这是泛指故用复数), 故Don't be afraid of making mistakes, 可以用情态动词can+动词原形, 主语we, 从...中学习用所给的learn from..., 用them替代mistakes, 故答案是Don't be afraid of making mistakes, we can learn from them.