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
The instructions were not easily understandable.
这份说明书不容易理解。
I'm two years older than you are.
我比你小2岁。
Four years later, she left the children's home and entered an institution for the blind, where she learnt braille.
4年之后，她离开孤儿院，进入一盲人学校，学习布莱叶盲文。