【1+1英文】
Angela: "Wow. Look how polite your son has become."
Andy: "Yes. We had a big talk with him, and he has really turned over a new leaf."

【1+1中文】
安吉拉：噢，你的儿子变得多有礼貌了呀！
安 迪：是的，我们和他认真地谈过了，他真的开始了崭新的一页！

【1+1解析】
Turning over a new leaf is like turning over a new page ("leaf") in your life and seeing what is on the other side.
中文意思：翻开新的一页。