3岁男孩自律英语可以说是"a three-year-old boy with self-discippne." 这个短语来源于英语中"self-discippne"这个单词，意思是自律。
例句：
The three-year-old boy showed remarkable self-discippne by sitting quietly during the entire movie.
3岁男孩在整个电影中都安静地坐着，表现出了显著的自律。
My son has been practicing self-discippne in order to improve his focus and concentration.
我儿子一直在练习自律，以提高他的专注力和集中力。
The teacher praised the students for their self-discippne during the field trip.
老师称赞学生们在野外游玩中的自律表现。