帮忙翻译一下关键词和摘要
摘 要 月相问题不是中学物理研究的主要内容，但是中学物理课本中却出现了月相问题。本文从月相成因入手，深入浅出的分析月相变化规律，可供中学物理教师作为教学参考资料。
关键词 月相 自转 公转
参考答案:Abstract：The phaze question is not the middle school physics research main content, but in the middle school physics textbook actually had the phaze problem. This article obtains, the analysis phaze from the phaze origin which explains the profound in simple language changes the rule, may for the middle school physics teacher to take the teaching reference.
Keyword：phaze，rotation，revolution
应该可以吧