这匹可靠的驮马帮我们把物资运到了山顶营地。

The dependable ___packhorse carried our supplies to the mountain top camp.

作为部门里唯一的老员工，他成了所有繁重工作的主要承担者。

Being the only senior in the department, he became the ___packhorse for all heavy workloads.