Definition
to progressively ready yourself for a challenging task
逐步為（挑戰性事情）做好準備
He plans to participate in the marathon, so he is working himself up to this challenge.
他計劃參加馬拉松，所以他正在為這項挑戰做好準備。
Before accepting the executive position, she needs to work herself up to this responsibility.
在接受執行職位之前，她需要為這項責任做好準備。
The child is gradually adjusting to the new school environment and working himself up to future academic challenges.
這個孩子正在逐漸適應新學校的環境，並為未來的學業挑戰做好準備。