Steppingstone
n. 踏脚石，达到目的的手段
🗣️ 情景例句
What do you call this? A tow year old child could have done a better job!
你是怎么回事？就连两岁的孩子都可以比这做得更好！
She is tickling her baby.
她在咯吱她的小宝宝。
There comes a bus.
汽车来了。