Treadstone
n. 踏脚石（喻被人利用的计划、行动等）; 踏脚石 （语见电影<碟影重重>）
🗣️ 情景例句
How do you think about it?
你认为怎么样？
I ask him to stay at school.
我要求他待在学校。
Which one is cheap? Which one is dear?
哪一支便宜？哪一支贵？