stepping-stone in one’s official career ? 那個家伙只是把現(xiàn)職工作作為自己的～而已。That fellow only took the present position as a stepping-stone in his official career.
進身之階jin shen zhi jie
stepping stone (in one’s official carreer)
進身之階jìn shēn zhī jiē
階：臺階。使身體能夠上升的階梯。比喻提拔升遷的門路。stepping-stone in one’s official career, a stepping-stone to some higher position