Definition
to progressively ready yourself for a challenging task
逐步为（挑战性事情）做好准备
He plans to participate in the marathon, so he is working himself up to this challenge.
他计划参加马拉松，所以他正在为这项挑战做好准备。
Before accepting the executive position, she needs to work herself up to this responsibility.
在接受执行职位之前，她需要为这项责任做好准备。
The child is gradually adjusting to the new school environment and working himself up to future academic challenges.
这个孩子正在逐渐适应新学校的环境，并为未来的学业挑战做好准备。