turn over a new leaf

基本解释

Deciding to turn over a new leaf in the new year could do more harm than good, a mental health charity has warned.
一家心理健康的慈善组织警告人们：新年立志，决定开启人生崭新一页的做法，对身体造成的影响弊大于利。
Their highly efficient, programmatic and creative work will turn over a new leaf in the course of healthy development of Beijing real estate industry.
通过高效务实和创造性的工作，为北京房地产事业的健康发展演绎新的传奇，谱写新的篇章。
edu.sina.com.cn
David Terry, 14, said he was hoping to "turn over a new leaf" after discipline problems in his previous school left him with an "average to really bad" academic record.
14岁的大卫·特�说，他希望自己能在这所学校“翻开新的一页”，他在过去那所学校因为学科问题，学习成绩被评定为“很差”。

Apple is understandably working to improve the mapping application, and removing Williamson appears to be part of an attempt to turn over a new leaf.
FORBES: Report: Maps Chief Ousted at Apple
In fact, if you think about it, the investors dumping its shares are in essence betting the U.S. government is about to turn over a new leaf and embrace tough, disciplined spending habits.
FORBES: CSC Shares Are A Bargain
Can the industry turn over a new leaf?
FORBES: How the Milk Industry Went Sour, and What Every Business Can Learn From It