wax and wane

汉语翻译

例句：

1. His love for her waxed and waned through the year that they knew each other.
   在他们相识的那一年里，他对她的爱一直时增时减。
2. Throughout history empires have waxed and waned.
   历史上各个帝国革故鼎新均有兴衰。