踏脚的

One of the pedals has come off my bicycle.

我那自行车踏脚板有一个已脱落。

Are good grades a stepping-stone to college?

成绩是大学踏脚石吗?

She looked on the governorship as a stepping-stone to the presidency.

她把州长之职当作进身总统职踏脚石。

He found a secure foothold and pulled himself up.

他找到一个稳固踏脚处并爬去。