Steppingstone
n. 踏脚石，达到目的的手段
🗣️ 情景例句
Make sure you file this invoice straight away; I don't want it being misplaced.
记得现在就把发票给开了，我可不想弄错了。
Are there any questions?
还有什么问题吗？
He has never borrowed money from me.
他从未向我借过钱。