求翻译：Zhangli在IMU项目期间任劳任怨，工作作风踏实，不计个人得失，多次受到项目组和客户的认可和表扬，在IMU无法替代故恳请延长zhangli原有合同，继续在IMU项目工作，谢谢。是什么意思？

Zhangli endurance during the IMU project, surefooted working style, regardless of personal gains and losses, many times by the project team and customer recognition and praise, IMU irreplaceable urge extending zhangli original contracts, continued to work in the IMU project, thank you.