She started as a low-level staff member but is now a department manager.

low-level 是由形容词 low（低的）和名词 level（级别）组成的复合形容词，字面意思是"低级别的"。 在职场语境中，low-level 用来形容职位或员工处于组织架构的底层，通常指"基层的"或"初级的"。