wax and wane undergo alternate increases and decreases.
2002New York Times The level of security that people are psychologically able to accept changes as crisis situations wax and wane.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。