trenches
in the trenches
working in the most active and difficult parts of a job or business:
The boss understands the difficulties we face here in the trenches.
He's a salesman with 30 years of in-the-trenches experience.
英语词典包含110679条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。