if you err on the side of caution when you are deciding what to do, you do the thing that is safe instead of taking a risk.
I decided to err on the side of caution and spend less than my full allowance.
英语词组固定搭配大全包含18674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。