Steppingstone
n. 踏脚石，达到目的的手段
🗣️ 情景例句
You know I only want on thing for you, and that is your happiness.
我对你只有一个希望，那就是你幸福。
Accidents will happen in the best regulated families.
即使家规严，丑事总难免。
It's a book.
一本书。